1621104210253 has 8 divisors (see below), whose sum is σ = 1776267972000. Its totient is φ = 1467238890480.

The previous prime is 1621104210233. The next prime is 1621104210331. The reversal of 1621104210253 is 3520124011261.

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

It is not a de Polignac number, because 1621104210253 - 2⁵ = 1621104210221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621104210233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324607878 + ... + 324612871.

It is an arithmetic number, because the mean of its divisors is an integer number (222033496500).

Almost surely, 2^{1621104210253} is an apocalyptic number.

It is an amenable number.

1621104210253 is a deficient number, since it is larger than the sum of its proper divisors (155163761747).

1621104210253 is a wasteful number, since it uses less digits than its factorization.

1621104210253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649220987.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 1621104210253 in words is "one trillion, six hundred twenty-one billion, one hundred four million, two hundred ten thousand, two hundred fifty-three".