10815999977 has 2 divisors, whose sum is σ = 10815999978. Its totient is φ = 10815999976.

The previous prime is 10815999967. The next prime is 10816000001. The reversal of 10815999977 is 77999951801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10705833961 + 110166016 = 103469^2 + 10496^2 .

It is a cyclic number.

It is not a de Polignac number, because 10815999977 - 2⁸ = 10815999721 is a prime.

It is not a weakly prime, because it can be changed into another prime (10815999967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5407999988 + 5407999989.

It is an arithmetic number, because the mean of its divisors is an integer number (5407999989).

Almost surely, 2^10815999977 is an apocalyptic number.

It is an amenable number.

10815999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

10815999977 is an equidigital number, since it uses as much as digits as its factorization.

10815999977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12859560, while the sum is 65.

The spelling of 10815999977 in words is "ten billion, eight hundred fifteen million, nine hundred ninety-nine thousand, nine hundred seventy-seven".