1961009112 has 16 divisors (see below), whose sum is σ = 4902522840. Its totient is φ = 653669696.

The previous prime is 1961009111. The next prime is 1961009123. The reversal of 1961009112 is 2119001691.

It is a self number, because there is not a number n which added to its sum of digits gives 1961009112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961009111) 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, 40854333 + ... + 40854380.

Almost surely, 2^1961009112 is an apocalyptic number.

1961009112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1961009112 is an abundant number, since it is smaller than the sum of its proper divisors (2941513728).

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

1961009112 is a wasteful number, since it uses less digits than its factorization.

1961009112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81708722 (or 81708718 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 30.

The square root of 1961009112 is about 44283.2825341573. The cubic root of 1961009112 is about 1251.6796858068.

The spelling of 1961009112 in words is "one billion, nine hundred sixty-one million, nine thousand, one hundred twelve".