1625521601640 has 32 divisors (see below), whose sum is σ = 4876564805280. Its totient is φ = 433472427072.

The previous prime is 1625521601593. The next prime is 1625521601719. The reversal of 1625521601640 is 461061255261.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6773006554 + ... + 6773006793.

It is an arithmetic number, because the mean of its divisors is an integer number (152392650165).

Almost surely, 2^{1625521601640} is an apocalyptic number.

1625521601640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625521601640 is an abundant number, since it is smaller than the sum of its proper divisors (3251043203640).

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

1625521601640 is a wasteful number, since it uses less digits than its factorization.

1625521601640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13546013361 (or 13546013357 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 1625521601640 in words is "one trillion, six hundred twenty-five billion, five hundred twenty-one million, six hundred one thousand, six hundred forty".