77421297426 has 32 divisors (see below), whose sum is σ = 173484583488. Its totient is φ = 22826917440.

The previous prime is 77421297403. The next prime is 77421297433. The reversal of 77421297426 is 62479212477.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15849585 + ... + 15854468.

It is an arithmetic number, because the mean of its divisors is an integer number (5421393234).

Almost surely, 2^77421297426 is an apocalyptic number.

77421297426 is an abundant number, since it is smaller than the sum of its proper divisors (96063286062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77421297426 is a wasteful number, since it uses less digits than its factorization.

77421297426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31704106.

The product of its digits is 2370816, while the sum is 51.

The spelling of 77421297426 in words is "seventy-seven billion, four hundred twenty-one million, two hundred ninety-seven thousand, four hundred twenty-six".