69139534464 has 384 divisors, whose sum is σ = 267134474880. Its totient is φ = 16576634880.

The previous prime is 69139534439. The next prime is 69139534481. The reversal of 69139534464 is 46443593196.

It is a happy number.

69139534464 is a `hidden beast` number, since 6 + 91 + 3 + 95 + 3 + 4 + 464 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a self number, because there is not a number n which added to its sum of digits gives 69139534464.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1123174 + ... + 1183130.

It is an arithmetic number, because the mean of its divisors is an integer number (695662695).

Almost surely, 2^69139534464 is an apocalyptic number.

69139534464 is a gapful number since it is divisible by the number (64) 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 69139534464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133567237440).

69139534464 is an abundant number, since it is smaller than the sum of its proper divisors (197994940416).

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

69139534464 is a wasteful number, since it uses less digits than its factorization.

69139534464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60008 (or 59993 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The spelling of 69139534464 in words is "sixty-nine billion, one hundred thirty-nine million, five hundred thirty-four thousand, four hundred sixty-four".