69138456671232 has 440 divisors, whose sum is σ = 223258396047456. Its totient is φ = 21273290661888.

The previous prime is 69138456671227. The next prime is 69138456671261. The reversal of 69138456671232 is 23217665483196.

69138456671232 is a `hidden beast` number, since 6 + 9 + 1 + 38 + 4 + 566 + 7 + 1 + 2 + 32 = 666.

It is a super-2 number, since 2×69138456671232² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 69138456671232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 261888163 + ... + 262152029.

Almost surely, 2^{69138456671232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69138456671232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111629198023728).

69138456671232 is an abundant number, since it is smaller than the sum of its proper divisors (154119939376224).

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

69138456671232 is an frugal number, since it uses more digits than its factorization.

69138456671232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263927 (or 263885 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 69138456671232 in words is "sixty-nine trillion, one hundred thirty-eight billion, four hundred fifty-six million, six hundred seventy-one thousand, two hundred thirty-two".