1621977599013 has 8 divisors (see below), whose sum is σ = 2163300400800. Its totient is φ = 1080986598288.

The previous prime is 1621977598993. The next prime is 1621977599029. The reversal of 1621977599013 is 3109957791261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1621977599013 - 2⁸ = 1621977598757 is a prime.

It is a super-2 number, since 2×1621977599013² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621977599113) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 82938858 + ... + 82958411.

It is an arithmetic number, because the mean of its divisors is an integer number (270412550100).

Almost surely, 2^{1621977599013} is an apocalyptic number.

It is an amenable number.

1621977599013 is a deficient number, since it is larger than the sum of its proper divisors (541322801787).

1621977599013 is a wasteful number, since it uses less digits than its factorization.

1621977599013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165900531.

The product of its (nonzero) digits is 6429780, while the sum is 60.

The spelling of 1621977599013 in words is "one trillion, six hundred twenty-one billion, nine hundred seventy-seven million, five hundred ninety-nine thousand, thirteen".