77855151 has 24 divisors (see below), whose sum is σ = 114997120. Its totient is φ = 46815120.

The previous prime is 77855149. The next prime is 77855203. The reversal of 77855151 is 15155877.

It is a happy number.

It is not a de Polignac number, because 77855151 - 2¹ = 77855149 is a prime.

It is a super-2 number, since 2×77855151² = 12122849074465602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77855131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49686 + ... + 51228.

Almost surely, 2^77855151 is an apocalyptic number.

77855151 is a deficient number, since it is larger than the sum of its proper divisors (37141969).

77855151 is a wasteful number, since it uses less digits than its factorization.

77855151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707 (or 1696 counting only the distinct ones).

The product of its digits is 49000, while the sum is 39.

The square root of 77855151 is about 8823.5565958405. The cubic root of 77855151 is about 427.0012212321.

The spelling of 77855151 in words is "seventy-seven million, eight hundred fifty-five thousand, one hundred fifty-one".