1621675902 has 32 divisors (see below), whose sum is σ = 4043660544. Its totient is φ = 421214400.

The previous prime is 1621675889. The next prime is 1621675903. The reversal of 1621675902 is 2095761261.

It is a super-2 number, since 2×1621675902² = 5259665462255027208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621675903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1754599 + ... + 1755522.

It is an arithmetic number, because the mean of its divisors is an integer number (126364392).

Almost surely, 2^1621675902 is an apocalyptic number.

1621675902 is an abundant number, since it is smaller than the sum of its proper divisors (2421984642).

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

1621675902 is a wasteful number, since it uses less digits than its factorization.

1621675902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510144.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1621675902 is about 40270.0372733873. The cubic root of 1621675902 is about 1174.8651487311.

The spelling of 1621675902 in words is "one billion, six hundred twenty-one million, six hundred seventy-five thousand, nine hundred two".