77631055 has 8 divisors (see below), whose sum is σ = 98060400. Its totient is φ = 58836096.

The previous prime is 77631053. The next prime is 77631067. The reversal of 77631055 is 55013677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77631055 - 2¹ = 77631053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77631055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77631053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408490 + ... + 408679.

It is an arithmetic number, because the mean of its divisors is an integer number (12257550).

Almost surely, 2^77631055 is an apocalyptic number.

77631055 is a deficient number, since it is larger than the sum of its proper divisors (20429345).

77631055 is a wasteful number, since it uses less digits than its factorization.

77631055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817193.

The product of its (nonzero) digits is 22050, while the sum is 34.

The square root of 77631055 is about 8810.8487105386. The cubic root of 77631055 is about 426.5911382285.

The spelling of 77631055 in words is "seventy-seven million, six hundred thirty-one thousand, fifty-five".