77994075902 has 4 divisors (see below), whose sum is σ = 116991113856. Its totient is φ = 38997037950.

The previous prime is 77994075883. The next prime is 77994075931. The reversal of 77994075902 is 20957049977.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×77994075902³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19498518974 + ... + 19498518977.

It is an arithmetic number, because the mean of its divisors is an integer number (29247778464).

Almost surely, 2^77994075902 is an apocalyptic number.

77994075902 is a deficient number, since it is larger than the sum of its proper divisors (38997037954).

77994075902 is a wasteful number, since it uses less digits than its factorization.

77994075902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38997037953.

The product of its (nonzero) digits is 10001880, while the sum is 59.

The spelling of 77994075902 in words is "seventy-seven billion, nine hundred ninety-four million, seventy-five thousand, nine hundred two".