69989590864 has 20 divisors (see below), whose sum is σ = 135650597940. Its totient is φ = 34982984960.

The previous prime is 69989590861. The next prime is 69989590871. The reversal of 69989590864 is 46809598996.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29306700864 + 40682890000 = 171192^2 + 201700^2 .

It is a super-2 number, since 2×69989590864² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69989590861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689167 + ... + 784174.

It is an arithmetic number, because the mean of its divisors is an integer number (6782529897).

Almost surely, 2^69989590864 is an apocalyptic number.

It is an amenable number.

69989590864 is a deficient number, since it is larger than the sum of its proper divisors (65661007076).

69989590864 is a wasteful number, since it uses less digits than its factorization.

69989590864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476318 (or 1476312 counting only the distinct ones).

The product of its (nonzero) digits is 302330880, while the sum is 73.

The spelling of 69989590864 in words is "sixty-nine billion, nine hundred eighty-nine million, five hundred ninety thousand, eight hundred sixty-four".