1654138915 has 32 divisors (see below), whose sum is σ = 2381654016. Its totient is φ = 1086821760.

The previous prime is 1654138907. The next prime is 1654138939. The reversal of 1654138915 is 5198314561.

It is not a de Polignac number, because 1654138915 - 2³ = 1654138907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8994 + ... + 58216.

It is an arithmetic number, because the mean of its divisors is an integer number (74426688).

Almost surely, 2^1654138915 is an apocalyptic number.

1654138915 is a deficient number, since it is larger than the sum of its proper divisors (727515101).

1654138915 is a wasteful number, since it uses less digits than its factorization.

1654138915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49299.

The product of its digits is 129600, while the sum is 43.

The square root of 1654138915 is about 40671.1066360383. The cubic root of 1654138915 is about 1182.6529687224.

The spelling of 1654138915 in words is "one billion, six hundred fifty-four million, one hundred thirty-eight thousand, nine hundred fifteen".