1961448516 has 36 divisors (see below), whose sum is σ = 4991395500. Its totient is φ = 649426368.

The previous prime is 1961448499. The next prime is 1961448547. The reversal of 1961448516 is 6158441691.

1961448516 is a `hidden beast` number, since 1 + 96 + 1 + 4 + 48 + 516 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 470716416 + 1490732100 = 21696^2 + 38610^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177471 + ... + 188198.

It is an arithmetic number, because the mean of its divisors is an integer number (138649875).

Almost surely, 2^1961448516 is an apocalyptic number.

It is an amenable number.

1961448516 is an abundant number, since it is smaller than the sum of its proper divisors (3029946984).

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

1961448516 is a wasteful number, since it uses less digits than its factorization.

1961448516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365828 (or 365823 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1961448516 is about 44288.2435415992. The cubic root of 1961448516 is about 1251.7731669272.

The spelling of 1961448516 in words is "one billion, nine hundred sixty-one million, four hundred forty-eight thousand, five hundred sixteen".