961381091525 has 24 divisors (see below), whose sum is σ = 1230959499264. Its totient is φ = 744058123200.

The previous prime is 961381091479. The next prime is 961381091537. The reversal of 961381091525 is 525190183169.

It is not a de Polignac number, because 961381091525 - 2¹⁴ = 961381075141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2258579 + ... + 2650271.

It is an arithmetic number, because the mean of its divisors is an integer number (51289979136).

Almost surely, 2^961381091525 is an apocalyptic number.

It is an amenable number.

961381091525 is a deficient number, since it is larger than the sum of its proper divisors (269578407739).

961381091525 is a wasteful number, since it uses less digits than its factorization.

961381091525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394901 (or 394896 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 50.

The spelling of 961381091525 in words is "nine hundred sixty-one billion, three hundred eighty-one million, ninety-one thousand, five hundred twenty-five".