961395401601 has 12 divisors (see below), whose sum is σ = 1461770786320. Its totient is φ = 607197095640.

The previous prime is 961395401599. The next prime is 961395401641. The reversal of 961395401601 is 106104593169.

961395401601 is a `hidden beast` number, since 9 + 6 + 1 + 39 + 5 + 4 + 0 + 1 + 601 = 666.

It is not a de Polignac number, because 961395401601 - 2¹ = 961395401599 is a prime.

It is a super-2 number, since 2×961395401601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961395401641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2811097495 + ... + 2811097836.

Almost surely, 2^961395401601 is an apocalyptic number.

It is an amenable number.

961395401601 is a deficient number, since it is larger than the sum of its proper divisors (500375384719).

961395401601 is a wasteful number, since it uses less digits than its factorization.

961395401601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622195356 (or 5622195353 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 961395401601 in words is "nine hundred sixty-one billion, three hundred ninety-five million, four hundred one thousand, six hundred one".