1961375784 has 32 divisors (see below), whose sum is σ = 5116633920. Its totient is φ = 625366016.

The previous prime is 1961375777. The next prime is 1961375803. The reversal of 1961375784 is 4875731691.

It is a happy number.

It is a super-2 number, since 2×1961375784² = 7693989932123229312, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1776057 + ... + 1777160.

It is an arithmetic number, because the mean of its divisors is an integer number (159894810).

Almost surely, 2^1961375784 is an apocalyptic number.

It is an amenable number.

1961375784 is an abundant number, since it is smaller than the sum of its proper divisors (3155258136).

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

1961375784 is a wasteful number, since it uses less digits than its factorization.

1961375784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553249 (or 3553245 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 1961375784 is about 44287.4224131412. The cubic root of 1961375784 is about 1251.7576945029.

The spelling of 1961375784 in words is "one billion, nine hundred sixty-one million, three hundred seventy-five thousand, seven hundred eighty-four".