77951055 has 32 divisors (see below), whose sum is σ = 153506304. Its totient is φ = 32893056.

The previous prime is 77951047. The next prime is 77951057. The reversal of 77951055 is 55015977.

It is not a de Polignac number, because 77951055 - 2³ = 77951047 is a prime.

It is a super-2 number, since 2×77951055² = 12152733951226050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77951057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27189 + ... + 29918.

It is an arithmetic number, because the mean of its divisors is an integer number (4797072).

Almost surely, 2^77951055 is an apocalyptic number.

77951055 is a deficient number, since it is larger than the sum of its proper divisors (75555249).

77951055 is a wasteful number, since it uses less digits than its factorization.

77951055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57135.

The product of its (nonzero) digits is 55125, while the sum is 39.

The square root of 77951055 is about 8828.9894665245. The cubic root of 77951055 is about 427.1764796927.

The spelling of 77951055 in words is "seventy-seven million, nine hundred fifty-one thousand, fifty-five".