77648270654 has 4 divisors (see below), whose sum is σ = 116472405984. Its totient is φ = 38824135326.

The previous prime is 77648270647. The next prime is 77648270663. The reversal of 77648270654 is 45607284677.

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

It is a self number, because there is not a number n which added to its sum of digits gives 77648270654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19412067662 + ... + 19412067665.

It is an arithmetic number, because the mean of its divisors is an integer number (29118101496).

Almost surely, 2^77648270654 is an apocalyptic number.

77648270654 is a deficient number, since it is larger than the sum of its proper divisors (38824135330).

77648270654 is a wasteful number, since it uses less digits than its factorization.

77648270654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38824135329.

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 77648270654 in words is "seventy-seven billion, six hundred forty-eight million, two hundred seventy thousand, six hundred fifty-four".