516553621540 has 24 divisors (see below), whose sum is σ = 1183377388032. Its totient is φ = 187837680480.

The previous prime is 516553621537. The next prime is 516553621663. The reversal of 516553621540 is 45126355615.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1173985284 + ... + 1173985723.

It is an arithmetic number, because the mean of its divisors is an integer number (49307391168).

Almost surely, 2^516553621540 is an apocalyptic number.

It is an amenable number.

516553621540 is an abundant number, since it is smaller than the sum of its proper divisors (666823766492).

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

516553621540 is a wasteful number, since it uses less digits than its factorization.

516553621540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347971027 (or 2347971025 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 516553621540 in words is "five hundred sixteen billion, five hundred fifty-three million, six hundred twenty-one thousand, five hundred forty".