77609072990 has 16 divisors (see below), whose sum is σ = 139710588048. Its totient is φ = 31040461056.

The previous prime is 77609072977. The next prime is 77609073011. The reversal of 77609072990 is 9927090677.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291827 + ... + 490286.

It is an arithmetic number, because the mean of its divisors is an integer number (8731911753).

Almost surely, 2^77609072990 is an apocalyptic number.

77609072990 is a deficient number, since it is larger than the sum of its proper divisors (62101515058).

77609072990 is a wasteful number, since it uses less digits than its factorization.

77609072990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792043.

The product of its (nonzero) digits is 3000564, while the sum is 56.

The spelling of 77609072990 in words is "seventy-seven billion, six hundred nine million, seventy-two thousand, nine hundred ninety".