126361703621 has 4 divisors (see below), whose sum is σ = 126366475872. Its totient is φ = 126356931372.

The previous prime is 126361703591. The next prime is 126361703641. The reversal of 126361703621 is 126307163621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126361703621 - 2¹⁴ = 126361687237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126361703641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346185 + ... + 2399438.

It is an arithmetic number, because the mean of its divisors is an integer number (31591618968).

Almost surely, 2^126361703621 is an apocalyptic number.

It is an amenable number.

126361703621 is a deficient number, since it is larger than the sum of its proper divisors (4772251).

126361703621 is an equidigital number, since it uses as much as digits as its factorization.

126361703621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772250.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 126361703621 in words is "one hundred twenty-six billion, three hundred sixty-one million, seven hundred three thousand, six hundred twenty-one".