1600561651 has 48 divisors (see below), whose sum is σ = 1922641920. Its totient is φ = 1326948480.

The previous prime is 1600561637. The next prime is 1600561661. The reversal of 1600561651 is 1561650061.

It is not a de Polignac number, because 1600561651 - 2¹³ = 1600553459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1600561621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4458210 + ... + 4458568.

It is an arithmetic number, because the mean of its divisors is an integer number (40055040).

Almost surely, 2^1600561651 is an apocalyptic number.

1600561651 is a deficient number, since it is larger than the sum of its proper divisors (322080269).

1600561651 is a wasteful number, since it uses less digits than its factorization.

1600561651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1600561651 is about 40007.0200214912. The cubic root of 1600561651 is about 1169.7439357318.

The spelling of 1600561651 in words is "one billion, six hundred million, five hundred sixty-one thousand, six hundred fifty-one".