77925633331 has 16 divisors (see below), whose sum is σ = 95985400000. Its totient is φ = 61605992448.

The previous prime is 77925633281. The next prime is 77925633377. The reversal of 77925633331 is 13333652977.

It is not a de Polignac number, because 77925633331 - 2¹¹ = 77925631283 is a prime.

It is a super-2 number, since 2×77925633331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77925633431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229146 + ... + 456463.

It is an arithmetic number, because the mean of its divisors is an integer number (5999087500).

Almost surely, 2^77925633331 is an apocalyptic number.

77925633331 is a deficient number, since it is larger than the sum of its proper divisors (18059766669).

77925633331 is a wasteful number, since it uses less digits than its factorization.

77925633331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686878.

The product of its digits is 2143260, while the sum is 49.

The spelling of 77925633331 in words is "seventy-seven billion, nine hundred twenty-five million, six hundred thirty-three thousand, three hundred thirty-one".