15522166621650 has 48 divisors (see below), whose sum is σ = 41456125013184. Its totient is φ = 3820841014080.

The previous prime is 15522166621631. The next prime is 15522166621657. The reversal of 15522166621650 is 5612666122551.

It is a self number, because there is not a number n which added to its sum of digits gives 15522166621650.

It is not an unprimeable number, because it can be changed into a prime (15522166621657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3980040774 + ... + 3980044673.

It is an arithmetic number, because the mean of its divisors is an integer number (863669271108).

Almost surely, 2^{15522166621650} is an apocalyptic number.

15522166621650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15522166621650 is an abundant number, since it is smaller than the sum of its proper divisors (25933958391534).

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

15522166621650 is a wasteful number, since it uses less digits than its factorization.

15522166621650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7960085475 (or 7960085470 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 15522166621650 in words is "fifteen trillion, five hundred twenty-two billion, one hundred sixty-six million, six hundred twenty-one thousand, six hundred fifty".