23139277456 has 45 divisors (see below), whose sum is σ = 47645975419. Its totient is φ = 10884204032.

The previous prime is 23139277387. The next prime is 23139277463. The reversal of 23139277456 is 65477293132.

The square root of 23139277456 is 152116.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7624083856 + 15515193600 = 87316^2 + 124560^2 .

It is a super-2 number, since 2×23139277456² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10342770 + ... + 10345006.

Almost surely, 2^23139277456 is an apocalyptic number.

23139277456 is the 152116-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23139277456

23139277456 is an abundant number, since it is smaller than the sum of its proper divisors (24506697963).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23139277456 is an frugal number, since it uses more digits than its factorization.

23139277456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516 (or 2256 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 49.

Multiplying 23139277456 by its sum of digits (49), we get a square (1133824595344 = 1064812²).

The spelling of 23139277456 in words is "twenty-three billion, one hundred thirty-nine million, two hundred seventy-seven thousand, four hundred fifty-six".