69212138724 has 81 divisors (see below), whose sum is σ = 176689651593. Its totient is φ = 22843936224.

The previous prime is 69212138719. The next prime is 69212138753. The reversal of 69212138724 is 42783121296.

The square root of 69212138724 is 263082.

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

It can be written as a sum of positive squares in only one way, i.e., 4553820324 + 64658318400 = 67482^2 + 254280^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 69212138724.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 257294062 + ... + 257294330.

Almost surely, 2^69212138724 is an apocalyptic number.

69212138724 is the 263082-nd square number.

It is an amenable number.

69212138724 is an abundant number, since it is smaller than the sum of its proper divisors (107477512869).

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

69212138724 is a wasteful number, since it uses less digits than its factorization.

69212138724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 437 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

It can be divided in two parts, 69212 and 138724, that added together give a square (207936 = 456²).

The spelling of 69212138724 in words is "sixty-nine billion, two hundred twelve million, one hundred thirty-eight thousand, seven hundred twenty-four".