126194380745 has 4 divisors (see below), whose sum is σ = 151433256900. Its totient is φ = 100955504592.

The previous prime is 126194380733. The next prime is 126194380757. The reversal of 126194380745 is 547083491621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547083491621 = 743 ⋅736316947.

It is an interprime number because it is at equal distance from previous prime (126194380733) and next prime (126194380757).

It can be written as a sum of positive squares in 2 ways, for example, as 37259808784 + 88934571961 = 193028^2 + 298219^2 .

It is a cyclic number.

It is not a de Polignac number, because 126194380745 - 2¹⁸ = 126194118601 is a prime.

It is a super-2 number, since 2×126194380745² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126194380693 and 126194380702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12619438070 + ... + 12619438079.

It is an arithmetic number, because the mean of its divisors is an integer number (37858314225).

It is a 2-persistent number, because it is pandigital, and so is 2⋅126194380745 = 252388761490, but 3⋅126194380745 = 378583142235 is not.

Almost surely, 2^126194380745 is an apocalyptic number.

It is an amenable number.

126194380745 is a deficient number, since it is larger than the sum of its proper divisors (25238876155).

126194380745 is an equidigital number, since it uses as much as digits as its factorization.

126194380745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25238876154.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 126194380745 in words is "one hundred twenty-six billion, one hundred ninety-four million, three hundred eighty thousand, seven hundred forty-five".