1620216625412 has 48 divisors (see below), whose sum is σ = 3535164431232. Its totient is φ = 631227098880.

The previous prime is 1620216625409. The next prime is 1620216625463. The reversal of 1620216625412 is 2145266120261.

It is a super-2 number, since 2×1620216625412² (a number of 25 digits) contains 22 as substring.

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, 8428238 + ... + 8618330.

It is an arithmetic number, because the mean of its divisors is an integer number (73649258984).

Almost surely, 2^{1620216625412} is an apocalyptic number.

It is an amenable number.

1620216625412 is an abundant number, since it is smaller than the sum of its proper divisors (1914947805820).

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

1620216625412 is a wasteful number, since it uses less digits than its factorization.

1620216625412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217788 (or 217786 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 1620216625412 in words is "one trillion, six hundred twenty billion, two hundred sixteen million, six hundred twenty-five thousand, four hundred twelve".