961551772 has 12 divisors (see below), whose sum is σ = 1771279720. Its totient is φ = 455471856.

The previous prime is 961551761. The next prime is 961551779. The reversal of 961551772 is 277155169.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961551779) 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, 6325923 + ... + 6326074.

Almost surely, 2^961551772 is an apocalyptic number.

It is an amenable number.

961551772 is a deficient number, since it is larger than the sum of its proper divisors (809727948).

961551772 is a wasteful number, since it uses less digits than its factorization.

961551772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12652020 (or 12652018 counting only the distinct ones).

The product of its digits is 132300, while the sum is 43.

The square root of 961551772 is about 31008.8982713027. The cubic root of 961551772 is about 987.0160712139.

The spelling of 961551772 in words is "nine hundred sixty-one million, five hundred fifty-one thousand, seven hundred seventy-two".