1601560651 has 16 divisors (see below), whose sum is σ = 1673140000. Its totient is φ = 1531623168.

The previous prime is 1601560643. The next prime is 1601560669. The reversal of 1601560651 is 1560651061.

It is a cyclic number.

It is not a de Polignac number, because 1601560651 - 2³ = 1601560643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601560151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 941800 + ... + 943498.

It is an arithmetic number, because the mean of its divisors is an integer number (104571250).

Almost surely, 2^1601560651 is an apocalyptic number.

1601560651 is a deficient number, since it is larger than the sum of its proper divisors (71579349).

1601560651 is a wasteful number, since it uses less digits than its factorization.

1601560651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158.

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

The square root of 1601560651 is about 40019.5033827258. The cubic root of 1601560651 is about 1169.9872526432.

The spelling of 1601560651 in words is "one billion, six hundred one million, five hundred sixty thousand, six hundred fifty-one".