76742424251 has 4 divisors (see below), whose sum is σ = 77019472992. Its totient is φ = 76465375512.

The previous prime is 76742424247. The next prime is 76742424313. The reversal of 76742424251 is 15242424767.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 76742424251 - 2² = 76742424247 is a prime.

It is a super-2 number, since 2×76742424251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76742424751) 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, 138523955 + ... + 138524508.

It is an arithmetic number, because the mean of its divisors is an integer number (19254868248).

Almost surely, 2^76742424251 is an apocalyptic number.

76742424251 is a deficient number, since it is larger than the sum of its proper divisors (277048741).

76742424251 is a wasteful number, since it uses less digits than its factorization.

76742424251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277048740.

The product of its digits is 752640, while the sum is 44.

The spelling of 76742424251 in words is "seventy-six billion, seven hundred forty-two million, four hundred twenty-four thousand, two hundred fifty-one".