990494624623 has 8 divisors (see below), whose sum is σ = 1132369833600. Its totient is φ = 848713409880.

The previous prime is 990494624579. The next prime is 990494624723. The reversal of 990494624623 is 326426494099.

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

It is not a de Polignac number, because 990494624623 - 2³⁷ = 853055671151 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 (990494624723) 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, 23475973 + ... + 23518126.

It is an arithmetic number, because the mean of its divisors is an integer number (141546229200).

Almost surely, 2^990494624623 is an apocalyptic number.

990494624623 is a deficient number, since it is larger than the sum of its proper divisors (141875208977).

990494624623 is a wasteful number, since it uses less digits than its factorization.

990494624623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46997117.

The product of its (nonzero) digits is 20155392, while the sum is 58.

The spelling of 990494624623 in words is "nine hundred ninety billion, four hundred ninety-four million, six hundred twenty-four thousand, six hundred twenty-three".