516621652 has 6 divisors (see below), whose sum is σ = 904087898. Its totient is φ = 258310824.

The previous prime is 516621643. The next prime is 516621667. The reversal of 516621652 is 256126615.

It can be written as a sum of positive squares in only one way, i.e., 321628356 + 194993296 = 17934^2 + 13964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64577703 + ... + 64577710.

Almost surely, 2^516621652 is an apocalyptic number.

It is an amenable number.

516621652 is a deficient number, since it is larger than the sum of its proper divisors (387466246).

516621652 is a wasteful number, since it uses less digits than its factorization.

516621652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129155417 (or 129155415 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 516621652 is about 22729.3126160911. The cubic root of 516621652 is about 802.3999037948.

The spelling of 516621652 in words is "five hundred sixteen million, six hundred twenty-one thousand, six hundred fifty-two".