1655161515 has 192 divisors, whose sum is σ = 3585254400. Its totient is φ = 690342912.

The previous prime is 1655161507. The next prime is 1655161523. The reversal of 1655161515 is 5151615561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1655161507) and next prime (1655161523).

It is not a de Polignac number, because 1655161515 - 2³ = 1655161507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1655161515.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 19941664 + ... + 19941746.

It is an arithmetic number, because the mean of its divisors is an integer number (18673200).

Almost surely, 2^1655161515 is an apocalyptic number.

1655161515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1655161515 is an abundant number, since it is smaller than the sum of its proper divisors (1930092885).

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

1655161515 is a wasteful number, since it uses less digits than its factorization.

1655161515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 223 counting only the distinct ones).

The product of its digits is 22500, while the sum is 36.

The square root of 1655161515 is about 40683.6762719398. The cubic root of 1655161515 is about 1182.8966265726.

The spelling of 1655161515 in words is "one billion, six hundred fifty-five million, one hundred sixty-one thousand, five hundred fifteen".