77465855856477 has 64 divisors (see below), whose sum is σ = 119481530554368. Its totient is φ = 44122195200000.

The previous prime is 77465855856463. The next prime is 77465855856551.

77465855856477 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77465855856477 - 2¹² = 77465855852381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77465855856477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77465855856457) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3922113352 + ... + 3922133102.

It is an arithmetic number, because the mean of its divisors is an integer number (1866898914912).

Almost surely, 2^{77465855856477} is an apocalyptic number.

It is an amenable number.

77465855856477 is a deficient number, since it is larger than the sum of its proper divisors (42015674697891).

77465855856477 is a wasteful number, since it uses less digits than its factorization.

77465855856477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29730.

The product of its digits is 55319040000, while the sum is 84.

The spelling of 77465855856477 in words is "seventy-seven trillion, four hundred sixty-five billion, eight hundred fifty-five million, eight hundred fifty-six thousand, four hundred seventy-seven".