505987117564 has 72 divisors (see below), whose sum is σ = 950719250432. Its totient is φ = 235567906560.

The previous prime is 505987117549. The next prime is 505987117579. The reversal of 505987117564 is 465711789505.

It is an interprime number because it is at equal distance from previous prime (505987117549) and next prime (505987117579).

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 505987117499 and 505987117508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53875309 + ... + 53884699.

Almost surely, 2^505987117564 is an apocalyptic number.

It is an amenable number.

505987117564 is a deficient number, since it is larger than the sum of its proper divisors (444732132868).

505987117564 is a wasteful number, since it uses less digits than its factorization.

505987117564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9923 (or 9904 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 58.

The spelling of 505987117564 in words is "five hundred five billion, nine hundred eighty-seven million, one hundred seventeen thousand, five hundred sixty-four".