126784242551 has 8 divisors (see below), whose sum is σ = 129741275664. Its totient is φ = 123827598720.

The previous prime is 126784242517. The next prime is 126784242569. The reversal of 126784242551 is 155242487621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126784242551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126784242496 and 126784242505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126784242451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623105 + ... + 801141.

It is an arithmetic number, because the mean of its divisors is an integer number (16217659458).

Almost surely, 2^126784242551 is an apocalyptic number.

126784242551 is a deficient number, since it is larger than the sum of its proper divisors (2957033113).

126784242551 is a wasteful number, since it uses less digits than its factorization.

126784242551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194641.

The product of its digits is 1075200, while the sum is 47.

The spelling of 126784242551 in words is "one hundred twenty-six billion, seven hundred eighty-four million, two hundred forty-two thousand, five hundred fifty-one".