77254340644 has 36 divisors (see below), whose sum is σ = 146422501680. Its totient is φ = 35649076320.

The previous prime is 77254340617. The next prime is 77254340699. The reversal of 77254340644 is 44604345277.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77254340594 and 77254340603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6058027 + ... + 6070765.

Almost surely, 2^77254340644 is an apocalyptic number.

It is an amenable number.

77254340644 is a deficient number, since it is larger than the sum of its proper divisors (69168161036).

77254340644 is a wasteful number, since it uses less digits than its factorization.

77254340644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21740 (or 21725 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 46.

The spelling of 77254340644 in words is "seventy-seven billion, two hundred fifty-four million, three hundred forty thousand, six hundred forty-four".