69691776064 has 21 divisors (see below), whose sum is σ = 138298809127. Its totient is φ = 34844832064.

The previous prime is 69691776043. The next prime is 69691776071. The reversal of 69691776064 is 46067719696.

The square root of 69691776064 is 263992.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69691775993 and 69691776011.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2095437 + ... + 2128435.

Almost surely, 2^69691776064 is an apocalyptic number.

69691776064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

69691776064 is the 263992-nd square number.

It is an amenable number.

69691776064 is a deficient number, since it is larger than the sum of its proper divisors (68607033063).

69691776064 is an frugal number, since it uses more digits than its factorization.

69691776064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66010 (or 33001 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 69691776064 in words is "sixty-nine billion, six hundred ninety-one million, seven hundred seventy-six thousand, sixty-four".