1961136860 has 24 divisors (see below), whose sum is σ = 4297448736. Its totient is φ = 750347840.

The previous prime is 1961136857. The next prime is 1961136871. The reversal of 1961136860 is 686311691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2131211 + ... + 2132130.

It is an arithmetic number, because the mean of its divisors is an integer number (179060364).

Almost surely, 2^1961136860 is an apocalyptic number.

1961136860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1961136860 is an abundant number, since it is smaller than the sum of its proper divisors (2336311876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961136860 is a wasteful number, since it uses less digits than its factorization.

1961136860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263373 (or 4263371 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1961136860 is about 44284.7249059989. The cubic root of 1961136860 is about 1251.7068650286.

The spelling of 1961136860 in words is "one billion, nine hundred sixty-one million, one hundred thirty-six thousand, eight hundred sixty".