961406813615 has 8 divisors (see below), whose sum is σ = 1153697787600. Its totient is φ = 769119043392.

The previous prime is 961406813611. The next prime is 961406813729. The reversal of 961406813615 is 516318604169.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 961406813615 - 2² = 961406813611 is a prime.

It is a super-2 number, since 2×961406813615² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961406813611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82094 + ... + 1389083.

It is an arithmetic number, because the mean of its divisors is an integer number (144212223450).

Almost surely, 2^961406813615 is an apocalyptic number.

961406813615 is a deficient number, since it is larger than the sum of its proper divisors (192290973985).

961406813615 is a wasteful number, since it uses less digits than its factorization.

961406813615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601881.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 961406813615 in words is "nine hundred sixty-one billion, four hundred six million, eight hundred thirteen thousand, six hundred fifteen".