961855977 has 16 divisors (see below), whose sum is σ = 1301493312. Its totient is φ = 631787520.

The previous prime is 961855969. The next prime is 961855997. The reversal of 961855977 is 779558169.

961855977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 961855977 - 2³ = 961855969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (961855907) 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, 58777 + ... + 73337.

It is an arithmetic number, because the mean of its divisors is an integer number (81343332).

Almost surely, 2^961855977 is an apocalyptic number.

961855977 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

961855977 is a deficient number, since it is larger than the sum of its proper divisors (339637335).

961855977 is a wasteful number, since it uses less digits than its factorization.

961855977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14888.

The product of its digits is 4762800, while the sum is 57.

The square root of 961855977 is about 31013.8030076932. The cubic root of 961855977 is about 987.1201472760.

The spelling of 961855977 in words is "nine hundred sixty-one million, eight hundred fifty-five thousand, nine hundred seventy-seven".