1961130577 has 12 divisors (see below), whose sum is σ = 2304839460. Its totient is φ = 1663635456.

The previous prime is 1961130553. The next prime is 1961130583. The reversal of 1961130577 is 7750311691.

It can be written as a sum of positive squares in 2 ways, for example, as 1280494656 + 680635921 = 35784^2 + 26089^2 .

It is not a de Polignac number, because 1961130577 - 2⁷ = 1961130449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1961134577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201552 + ... + 211057.

It is an arithmetic number, because the mean of its divisors is an integer number (192069955).

Almost surely, 2^1961130577 is an apocalyptic number.

It is an amenable number.

1961130577 is a deficient number, since it is larger than the sum of its proper divisors (343708883).

1961130577 is an equidigital number, since it uses as much as digits as its factorization.

1961130577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412720 (or 412713 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 1961130577 is about 44284.6539672605. The cubic root of 1961130577 is about 1251.7055283069.

The spelling of 1961130577 in words is "one billion, nine hundred sixty-one million, one hundred thirty thousand, five hundred seventy-seven".