516621630 has 64 divisors (see below), whose sum is σ = 1478642688. Its totient is φ = 112949760.

The previous prime is 516621629. The next prime is 516621643. The reversal of 516621630 is 36126615.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 48651 + ... + 58310.

It is an arithmetic number, because the mean of its divisors is an integer number (23103792).

Almost surely, 2^516621630 is an apocalyptic number.

516621630 is an abundant number, since it is smaller than the sum of its proper divisors (962021058).

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

516621630 is a wasteful number, since it uses less digits than its factorization.

516621630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107001.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 516621630 is about 22729.3121321346. The cubic root of 516621630 is about 802.3998924049.

It can be divided in two parts, 5166 and 21630, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 516621630 in words is "five hundred sixteen million, six hundred twenty-one thousand, six hundred thirty".