977115157555 has 16 divisors (see below), whose sum is σ = 1187988897600. Its totient is φ = 771425374720.

The previous prime is 977115157549. The next prime is 977115157589. The reversal of 977115157555 is 555751511779.

It is a happy number.

It is not a de Polignac number, because 977115157555 - 2³ = 977115157547 is a prime.

It is a super-2 number, since 2×977115157555² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 977115157555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875415 + ... + 2339104.

It is an arithmetic number, because the mean of its divisors is an integer number (74249306100).

Almost surely, 2^977115157555 is an apocalyptic number.

977115157555 is a deficient number, since it is larger than the sum of its proper divisors (210873740045).

977115157555 is a wasteful number, since it uses less digits than its factorization.

977115157555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215134.

The product of its digits is 9646875, while the sum is 58.

The spelling of 977115157555 in words is "nine hundred seventy-seven billion, one hundred fifteen million, one hundred fifty-seven thousand, five hundred fifty-five".