77152881 has 32 divisors (see below), whose sum is σ = 114946048. Its totient is φ = 45722880.

The previous prime is 77152849. The next prime is 77152903. The reversal of 77152881 is 18825177.

It is not a de Polignac number, because 77152881 - 2⁵ = 77152849 is a prime.

It is a super-2 number, since 2×77152881² = 11905134093200322, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77152841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183051 + ... + 183471.

It is an arithmetic number, because the mean of its divisors is an integer number (3592064).

Almost surely, 2^77152881 is an apocalyptic number.

It is an amenable number.

77152881 is a deficient number, since it is larger than the sum of its proper divisors (37793167).

77152881 is a wasteful number, since it uses less digits than its factorization.

77152881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601.

The product of its digits is 31360, while the sum is 39.

The square root of 77152881 is about 8783.6712711713. The cubic root of 77152881 is about 425.7134609054.

The spelling of 77152881 in words is "seventy-seven million, one hundred fifty-two thousand, eight hundred eighty-one".