69145857936 has 135 divisors (see below), whose sum is σ = 205724639731. Its totient is φ = 21675988992.

The previous prime is 69145857829. The next prime is 69145857971. The reversal of 69145857936 is 63975854196.

The square root of 69145857936 is 262956.

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

69145857936 is a `hidden beast` number, since 6 + 9 + 1 + 4 + 58 + 579 + 3 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 24093248400 + 45052609536 = 155220^2 + 212256^2 .

It is a super-2 number, since 2×69145857936² (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 26 ways as a sum of consecutive naturals, for example, 53642380 + ... + 53643668.

Almost surely, 2^69145857936 is an apocalyptic number.

69145857936 is the 262956-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69145857936

69145857936 is an abundant number, since it is smaller than the sum of its proper divisors (136578781795).

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

69145857936 is a wasteful number, since it uses less digits than its factorization.

69145857936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626 (or 1311 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The spelling of 69145857936 in words is "sixty-nine billion, one hundred forty-five million, eight hundred fifty-seven thousand, nine hundred thirty-six".