1651605612 has 24 divisors (see below), whose sum is σ = 3854412912. Its totient is φ = 550440000.

The previous prime is 1651605611. The next prime is 1651605653. The reversal of 1651605612 is 2165061561.

It is not an unprimeable number, because it can be changed into a prime (1651605611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111862 + ... + 125762.

It is an arithmetic number, because the mean of its divisors is an integer number (160600538).

Almost surely, 2^1651605612 is an apocalyptic number.

1651605612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1651605612 is an abundant number, since it is smaller than the sum of its proper divisors (2202807300).

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

1651605612 is a wasteful number, since it uses less digits than its factorization.

1651605612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23809 (or 23807 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1651605612 is about 40639.9509350098. The cubic root of 1651605612 is about 1182.0489184721.

The spelling of 1651605612 in words is "one billion, six hundred fifty-one million, six hundred five thousand, six hundred twelve".