7977210474681 has 192 divisors, whose sum is σ = 14635818024960. Its totient is φ = 4274723496960.

The previous prime is 7977210474671. The next prime is 7977210474697. The reversal of 7977210474681 is 1864740127797.

7977210474681 is a `hidden beast` number, since 7 + 9 + 7 + 72 + 10 + 474 + 6 + 81 = 666.

It is not a de Polignac number, because 7977210474681 - 2⁷ = 7977210474553 is a prime.

It is a super-2 number, since 2×7977210474681² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (7977210474661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 223954185 + ... + 223989801.

It is an arithmetic number, because the mean of its divisors is an integer number (76228218880).

Almost surely, 2^{7977210474681} is an apocalyptic number.

It is an amenable number.

7977210474681 is a deficient number, since it is larger than the sum of its proper divisors (6658607550279).

7977210474681 is a wasteful number, since it uses less digits than its factorization.

7977210474681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35841 (or 35828 counting only the distinct ones).

The product of its (nonzero) digits is 33191424, while the sum is 63.

The spelling of 7977210474681 in words is "seven trillion, nine hundred seventy-seven billion, two hundred ten million, four hundred seventy-four thousand, six hundred eighty-one".