1651129920 has 280 divisors, whose sum is σ = 6408407808. Its totient is φ = 400204800.

The previous prime is 1651129919. The next prime is 1651129937. The reversal of 1651129920 is 299211561.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 282225 + ... + 288015.

Almost surely, 2^1651129920 is an apocalyptic number.

1651129920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1651129920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3204203904).

1651129920 is an abundant number, since it is smaller than the sum of its proper divisors (4757277888).

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

1651129920 is a wasteful number, since it uses less digits than its factorization.

1651129920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5831 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1651129920 is about 40634.0979966333. The cubic root of 1651129920 is about 1181.9354238214.

The spelling of 1651129920 in words is "one billion, six hundred fifty-one million, one hundred twenty-nine thousand, nine hundred twenty".