1001664615 has 32 divisors (see below), whose sum is σ = 1869004800. Its totient is φ = 457901472.

The previous prime is 1001664607. The next prime is 1001664623. The reversal of 1001664615 is 5164661001.

It is an interprime number because it is at equal distance from previous prime (1001664607) and next prime (1001664623).

It is not a de Polignac number, because 1001664615 - 2³ = 1001664607 is a prime.

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, 92199 + ... + 102488.

It is an arithmetic number, because the mean of its divisors is an integer number (58406400).

Almost surely, 2^1001664615 is an apocalyptic number.

1001664615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001664615 is a deficient number, since it is larger than the sum of its proper divisors (867340185).

1001664615 is an equidigital number, since it uses as much as digits as its factorization.

1001664615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194716 (or 194702 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1001664615 is about 31649.0855318128. The cubic root of 1001664615 is about 1000.5545640685.

The spelling of 1001664615 in words is "one billion, one million, six hundred sixty-four thousand, six hundred fifteen".