1961481788 has 24 divisors (see below), whose sum is σ = 3929100672. Its totient is φ = 839319984.

The previous prime is 1961481763. The next prime is 1961481793. The reversal of 1961481788 is 8871841691.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 36470 + ... + 72477.

It is an arithmetic number, because the mean of its divisors is an integer number (163712528).

Almost surely, 2^1961481788 is an apocalyptic number.

It is an amenable number.

1961481788 is an abundant number, since it is smaller than the sum of its proper divisors (1967618884).

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

1961481788 is a wasteful number, since it uses less digits than its factorization.

1961481788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109601 (or 109599 counting only the distinct ones).

The product of its digits is 774144, while the sum is 53.

The square root of 1961481788 is about 44288.6191701661. The cubic root of 1961481788 is about 1251.7802448191.

The spelling of 1961481788 in words is "one billion, nine hundred sixty-one million, four hundred eighty-one thousand, seven hundred eighty-eight".