23519472778 has 4 divisors (see below), whose sum is σ = 35279209170. Its totient is φ = 11759736388.

The previous prime is 23519472731. The next prime is 23519472803. The reversal of 23519472778 is 87727491532.

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

It can be written as a sum of positive squares in only one way, i.e., 13504066849 + 10015405929 = 116207^2 + 100077^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5879868193 + ... + 5879868196.

Almost surely, 2^23519472778 is an apocalyptic number.

23519472778 is a deficient number, since it is larger than the sum of its proper divisors (11759736392).

23519472778 is a wasteful number, since it uses less digits than its factorization.

23519472778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11759736391.

The product of its digits is 5927040, while the sum is 55.

The spelling of 23519472778 in words is "twenty-three billion, five hundred nineteen million, four hundred seventy-two thousand, seven hundred seventy-eight".