3521622161556 has 48 divisors (see below), whose sum is σ = 9150741432000. Its totient is φ = 1171224209376.

The previous prime is 3521622161513. The next prime is 3521622161587. The reversal of 3521622161556 is 6551612261253.

3521622161556 is a `hidden beast` number, since 3 + 5 + 2 + 1 + 6 + 2 + 21 + 615 + 5 + 6 = 666.

It is a super-2 number, since 2×3521622161556² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36755331 + ... + 36851018.

It is an arithmetic number, because the mean of its divisors is an integer number (190640446500).

Almost surely, 2^{3521622161556} is an apocalyptic number.

3521622161556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3521622161556 is an abundant number, since it is smaller than the sum of its proper divisors (5629119270444).

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

3521622161556 is a wasteful number, since it uses less digits than its factorization.

3521622161556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73606805 (or 73606797 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 3521622161556 in words is "three trillion, five hundred twenty-one billion, six hundred twenty-two million, one hundred sixty-one thousand, five hundred fifty-six".