1656115290 has 48 divisors (see below), whose sum is σ = 4309014528. Its totient is φ = 441311328.

The previous prime is 1656115283. The next prime is 1656115343. The reversal of 1656115290 is 925116561.

1656115290 is a `hidden beast` number, since 1 + 6 + 561 + 1 + 5 + 2 + 90 = 666.

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, 135159 + ... + 146901.

It is an arithmetic number, because the mean of its divisors is an integer number (89771136).

Almost surely, 2^1656115290 is an apocalyptic number.

1656115290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1656115290 is an abundant number, since it is smaller than the sum of its proper divisors (2652899238).

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

1656115290 is a wasteful number, since it uses less digits than its factorization.

1656115290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13323 (or 13320 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 1656115290 is about 40695.3964226914. The cubic root of 1656115290 is about 1183.1237948540.

The spelling of 1656115290 in words is "one billion, six hundred fifty-six million, one hundred fifteen thousand, two hundred ninety".