1520639320164 has 24 divisors (see below), whose sum is σ = 3548533708608. Its totient is φ = 506826159840.

The previous prime is 1520639320139. The next prime is 1520639320169. The reversal of 1520639320164 is 4610239360251.

It is not an unprimeable number, because it can be changed into a prime (1520639320169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6583432 + ... + 6810495.

It is an arithmetic number, because the mean of its divisors is an integer number (147855571192).

Almost surely, 2^{1520639320164} is an apocalyptic number.

It is an amenable number.

1520639320164 is an abundant number, since it is smaller than the sum of its proper divisors (2027894388444).

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

1520639320164 is a wasteful number, since it uses less digits than its factorization.

1520639320164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13403395 (or 13403393 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 1520639320164 in words is "one trillion, five hundred twenty billion, six hundred thirty-nine million, three hundred twenty thousand, one hundred sixty-four".