69090987520 has 80 divisors (see below), whose sum is σ = 165752516160. Its totient is φ = 27620368384.

The previous prime is 69090987487. The next prime is 69090987541. The reversal of 69090987520 is 2578909096.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5044041 + ... + 5057719.

It is an arithmetic number, because the mean of its divisors is an integer number (2071906452).

Almost surely, 2^69090987520 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 69090987520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82876258080).

69090987520 is an abundant number, since it is smaller than the sum of its proper divisors (96661528640).

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

69090987520 is a wasteful number, since it uses less digits than its factorization.

69090987520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15675 (or 15659 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 69090987520 in words is "sixty-nine billion, ninety million, nine hundred eighty-seven thousand, five hundred twenty".