999977610799 has 2 divisors, whose sum is σ = 999977610800. Its totient is φ = 999977610798.

The previous prime is 999977610703. The next prime is 999977610803. The reversal of 999977610799 is 997016779999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999977610799 - 2²⁵ = 999944056367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999977620799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499988805399 + 499988805400.

It is an arithmetic number, because the mean of its divisors is an integer number (499988805400).

Almost surely, 2^999977610799 is an apocalyptic number.

999977610799 is a deficient number, since it is larger than the sum of its proper divisors (1).

999977610799 is an equidigital number, since it uses as much as digits as its factorization.

999977610799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1093705578, while the sum is 82.

It can be divided in two parts, 9999776 and 10799, that added together give a triangular number (10010575 = T₄₄₇₄).

The spelling of 999977610799 in words is "nine hundred ninety-nine billion, nine hundred seventy-seven million, six hundred ten thousand, seven hundred ninety-nine".