1351645992 has 24 divisors (see below), whose sum is σ = 3660708090. Its totient is φ = 450548640.

The previous prime is 1351645969. The next prime is 1351646017. The reversal of 1351645992 is 2995461531.

1351645992 is a `hidden beast` number, since 1 + 3 + 51 + 6 + 4 + 599 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1033879716 + 317766276 = 32154^2 + 17826^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9386359 + ... + 9386502.

Almost surely, 2^1351645992 is an apocalyptic number.

1351645992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1351645992 is an abundant number, since it is smaller than the sum of its proper divisors (2309062098).

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

1351645992 is a wasteful number, since it uses less digits than its factorization.

1351645992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772873 (or 18772866 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 1351645992 is about 36764.7384323621. The cubic root of 1351645992 is about 1105.6584439307.

The spelling of 1351645992 in words is "one billion, three hundred fifty-one million, six hundred forty-five thousand, nine hundred ninety-two".