677902108581 has 32 divisors (see below), whose sum is σ = 1021621933440. Its totient is φ = 444152073600.

The previous prime is 677902108567. The next prime is 677902108601. The reversal of 677902108581 is 185801209776.

It is not a de Polignac number, because 677902108581 - 2¹³ = 677902100389 is a prime.

It is a super-2 number, since 2×677902108581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677902108561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1792366 + ... + 2137376.

It is an arithmetic number, because the mean of its divisors is an integer number (31925685420).

Almost surely, 2^677902108581 is an apocalyptic number.

677902108581 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

677902108581 is a deficient number, since it is larger than the sum of its proper divisors (343719824859).

677902108581 is a wasteful number, since it uses less digits than its factorization.

677902108581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346274 (or 346268 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 677902108581 in words is "six hundred seventy-seven billion, nine hundred two million, one hundred eight thousand, five hundred eighty-one".