953697161621 has 4 divisors (see below), whose sum is σ = 976958068044. Its totient is φ = 930436255200.

The previous prime is 953697161579. The next prime is 953697161647. The reversal of 953697161621 is 126161796359.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126161796359 = 29 ⋅4350406771.

It can be written as a sum of positive squares in 2 ways, for example, as 488061520996 + 465635640625 = 698614^2 + 682375^2 .

It is not a de Polignac number, because 953697161621 - 2³⁴ = 936517292437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (953697161321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11630453150 + ... + 11630453231.

It is an arithmetic number, because the mean of its divisors is an integer number (244239517011).

Almost surely, 2^953697161621 is an apocalyptic number.

It is an amenable number.

953697161621 is a deficient number, since it is larger than the sum of its proper divisors (23260906423).

953697161621 is a wasteful number, since it uses less digits than its factorization.

953697161621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23260906422.

The product of its digits is 3674160, while the sum is 56.

The spelling of 953697161621 in words is "nine hundred fifty-three billion, six hundred ninety-seven million, one hundred sixty-one thousand, six hundred twenty-one".