15993000765 has 96 divisors (see below), whose sum is σ = 32943905280. Its totient is φ = 7022356992.

The previous prime is 15993000761. The next prime is 15993000769. The reversal of 15993000765 is 56700039951.

It is an interprime number because it is at equal distance from previous prime (15993000761) and next prime (15993000769).

It is not a de Polignac number, because 15993000765 - 2² = 15993000761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 15993000765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15993000761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1795152 + ... + 1804038.

It is an arithmetic number, because the mean of its divisors is an integer number (343165680).

Almost surely, 2^15993000765 is an apocalyptic number.

15993000765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15993000765 is an abundant number, since it is smaller than the sum of its proper divisors (16950904515).

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

15993000765 is a wasteful number, since it uses less digits than its factorization.

15993000765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9131 (or 9128 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The spelling of 15993000765 in words is "fifteen billion, nine hundred ninety-three million, seven hundred sixty-five", and thus it is an aban number.