1961111076 has 24 divisors (see below), whose sum is σ = 4579893024. Its totient is φ = 653136960.

The previous prime is 1961111069. The next prime is 1961111081. The reversal of 1961111076 is 6701111691.

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, 56305 + ... + 84216.

It is an arithmetic number, because the mean of its divisors is an integer number (190828876).

Almost surely, 2^1961111076 is an apocalyptic number.

It is an amenable number.

1961111076 is an abundant number, since it is smaller than the sum of its proper divisors (2618781948).

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

1961111076 is a wasteful number, since it uses less digits than its factorization.

1961111076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141691 (or 141689 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 33.

The square root of 1961111076 is about 44284.4337888608. The cubic root of 1961111076 is about 1251.7013794092.

The spelling of 1961111076 in words is "one billion, nine hundred sixty-one million, one hundred eleven thousand, seventy-six".