69231697920 has 1120 divisors, whose sum is σ = 310577642496. Its totient is φ = 14332723200.

The previous prime is 69231697907. The next prime is 69231697939. The reversal of 69231697920 is 2979613296.

It is a tau number, because it is divible by the number of its divisors (1120).

It is a super-2 number, since 2×69231697920² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 255467385 + ... + 255467655.

Almost surely, 2^69231697920 is an apocalyptic number.

69231697920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69231697920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155288821248).

69231697920 is an abundant number, since it is smaller than the sum of its proper divisors (241345944576).

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

69231697920 is a wasteful number, since it uses less digits than its factorization.

69231697920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 69231697920 in words is "sixty-nine billion, two hundred thirty-one million, six hundred ninety-seven thousand, nine hundred twenty".