77900222002 has 8 divisors (see below), whose sum is σ = 121930782336. Its totient is φ = 37256627892.

The previous prime is 77900221991. The next prime is 77900222021. The reversal of 77900222002 is 20022200977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846741498 + ... + 846741589.

It is an arithmetic number, because the mean of its divisors is an integer number (15241347792).

Almost surely, 2^77900222002 is an apocalyptic number.

77900222002 is a deficient number, since it is larger than the sum of its proper divisors (44030560334).

77900222002 is a wasteful number, since it uses less digits than its factorization.

77900222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693483112.

The product of its (nonzero) digits is 7056, while the sum is 31.

Adding to 77900222002 its reverse (20022200977), we get a palindrome (97922422979).

The spelling of 77900222002 in words is "seventy-seven billion, nine hundred million, two hundred twenty-two thousand, two".