999999000776 has 8 divisors (see below), whose sum is σ = 1874998126470. Its totient is φ = 499999500384.

The previous prime is 999999000769. The next prime is 999999000779. The reversal of 999999000776 is 677000999999.

It can be written as a sum of positive squares in only one way, i.e., 986664756100 + 13334244676 = 993310^2 + 115474^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (999999000779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62499937541 + ... + 62499937556.

Almost surely, 2^999999000776 is an apocalyptic number.

It is an amenable number.

999999000776 is a deficient number, since it is larger than the sum of its proper divisors (874999125694).

999999000776 is a wasteful number, since it uses less digits than its factorization.

999999000776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124999875103 (or 124999875099 counting only the distinct ones).

The product of its (nonzero) digits is 156243654, while the sum is 74.

The spelling of 999999000776 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, seven hundred seventy-six", and thus it is an aban number.