35921999961 has 15 divisors (see below), whose sum is σ = 53663807461. Its totient is φ = 23946862788.

The previous prime is 35921999959. The next prime is 35921999977. The reversal of 35921999961 is 16999912953.

The square root of 35921999961 is 189531.

It is a perfect power (a square), and thus also a powerful number.

35921999961 is a `hidden beast` number, since 359 + 2 + 199 + 9 + 96 + 1 = 666.

It is not a de Polignac number, because 35921999961 - 2¹ = 35921999959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (35921999941) 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 14 ways as a sum of consecutive naturals, for example, 1695250 + ... + 1716308.

Almost surely, 2^35921999961 is an apocalyptic number.

35921999961 is the 189531-st square number.

35921999961 is the 94766-th centered octagonal number.

It is an amenable number.

35921999961 is a deficient number, since it is larger than the sum of its proper divisors (17741807500).

35921999961 is an frugal number, since it uses more digits than its factorization.

35921999961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42130 (or 21062 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 63.

The spelling of 35921999961 in words is "thirty-five billion, nine hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred sixty-one".