1620615633212 has 48 divisors (see below), whose sum is σ = 2948520960000. Its totient is φ = 778560002880.

The previous prime is 1620615633209. The next prime is 1620615633269. The reversal of 1620615633212 is 2123365160261.

It is a super-2 number, since 2×1620615633212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44305643 + ... + 44342205.

It is an arithmetic number, because the mean of its divisors is an integer number (61427520000).

Almost surely, 2^{1620615633212} is an apocalyptic number.

It is an amenable number.

1620615633212 is a deficient number, since it is larger than the sum of its proper divisors (1327905326788).

1620615633212 is a wasteful number, since it uses less digits than its factorization.

1620615633212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39146 (or 39144 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 1620615633212 in words is "one trillion, six hundred twenty billion, six hundred fifteen million, six hundred thirty-three thousand, two hundred twelve".