961615761 has 16 divisors (see below), whose sum is σ = 1367352000. Its totient is φ = 599021568.

The previous prime is 961615757. The next prime is 961615777. The reversal of 961615761 is 167516169.

It is not a de Polignac number, because 961615761 - 2² = 961615757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (961615661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60736 + ... + 74913.

It is an arithmetic number, because the mean of its divisors is an integer number (85459500).

Almost surely, 2^961615761 is an apocalyptic number.

It is an amenable number.

961615761 is a deficient number, since it is larger than the sum of its proper divisors (405736239).

961615761 is a wasteful number, since it uses less digits than its factorization.

961615761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135808.

The product of its digits is 68040, while the sum is 42.

The square root of 961615761 is about 31009.9300386183. The cubic root of 961615761 is about 987.0379652579.

The spelling of 961615761 in words is "nine hundred sixty-one million, six hundred fifteen thousand, seven hundred sixty-one".