1651961129 has 16 divisors (see below), whose sum is σ = 2056037760. Its totient is φ = 1292353920.

The previous prime is 1651961093. The next prime is 1651961141. The reversal of 1651961129 is 9211691561.

It is a de Polignac number, because none of the positive numbers 2^k-1651961129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1651961149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93887 + ... + 110084.

It is an arithmetic number, because the mean of its divisors is an integer number (128502360).

Almost surely, 2^1651961129 is an apocalyptic number.

It is an amenable number.

1651961129 is a deficient number, since it is larger than the sum of its proper divisors (404076631).

1651961129 is a wasteful number, since it uses less digits than its factorization.

1651961129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204080.

The product of its digits is 29160, while the sum is 41.

The square root of 1651961129 is about 40644.3246837735. The cubic root of 1651961129 is about 1182.1337265185.

The spelling of 1651961129 in words is "one billion, six hundred fifty-one million, nine hundred sixty-one thousand, one hundred twenty-nine".