1620433659272 has 128 divisors (see below), whose sum is σ = 3333665237760. Its totient is φ = 735405834240.

The previous prime is 1620433659269. The next prime is 1620433659293. The reversal of 1620433659272 is 2729563340261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620433659272.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212623622 + ... + 212631242.

It is an arithmetic number, because the mean of its divisors is an integer number (26044259670).

Almost surely, 2^{1620433659272} is an apocalyptic number.

It is an amenable number.

1620433659272 is an abundant number, since it is smaller than the sum of its proper divisors (1713231578488).

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

1620433659272 is a wasteful number, since it uses less digits than its factorization.

1620433659272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8143 (or 8139 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 1620433659272 in words is "one trillion, six hundred twenty billion, four hundred thirty-three million, six hundred fifty-nine thousand, two hundred seventy-two".