22978432977 has 8 divisors (see below), whose sum is σ = 30704372160. Its totient is φ = 15285724560.

The previous prime is 22978432931. The next prime is 22978432991. The reversal of 22978432977 is 77923487922.

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

It is not a de Polignac number, because 22978432977 - 2¹⁰ = 22978431953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22978432977.

It is not an unprimeable number, because it can be changed into a prime (22978432927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8306077 + ... + 8308842.

It is an arithmetic number, because the mean of its divisors is an integer number (3838046520).

Almost surely, 2^22978432977 is an apocalyptic number.

It is an amenable number.

22978432977 is a deficient number, since it is larger than the sum of its proper divisors (7725939183).

22978432977 is a wasteful number, since it uses less digits than its factorization.

22978432977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16615383.

The product of its digits is 21337344, while the sum is 60.

Subtracting 22978432977 from its reverse (77923487922), we obtain a palindrome (54945054945).

The spelling of 22978432977 in words is "twenty-two billion, nine hundred seventy-eight million, four hundred thirty-two thousand, nine hundred seventy-seven".