1651401648 has 80 divisors (see below), whose sum is σ = 5104777440. Its totient is φ = 508121856.

The previous prime is 1651401601. The next prime is 1651401659. The reversal of 1651401648 is 8461041561.

1651401648 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 4 + 0 + 1 + 648 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141411 + ... + 152642.

It is an arithmetic number, because the mean of its divisors is an integer number (63809718).

Almost surely, 2^1651401648 is an apocalyptic number.

1651401648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1651401648 is an abundant number, since it is smaller than the sum of its proper divisors (3453375792).

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

1651401648 is a wasteful number, since it uses less digits than its factorization.

1651401648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294083 (or 294071 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1651401648 is about 40637.4414548948. The cubic root of 1651401648 is about 1182.0002576721. Note that the first 3 decimals are identical.

The spelling of 1651401648 in words is "one billion, six hundred fifty-one million, four hundred one thousand, six hundred forty-eight".