1961575625 has 10 divisors (see below), whose sum is σ = 2451185682. Its totient is φ = 1569260000.

The previous prime is 1961575621. The next prime is 1961575639. The reversal of 1961575625 is 5265751691.

It can be written as a sum of positive squares in 5 ways, for example, as 1384807369 + 576768256 = 37213^2 + 24016^2 .

It is not a de Polignac number, because 1961575625 - 2² = 1961575621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961575625.

It is not an unprimeable number, because it can be changed into a prime (1961575621) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1568636 + ... + 1569885.

Almost surely, 2^1961575625 is an apocalyptic number.

It is an amenable number.

1961575625 is a deficient number, since it is larger than the sum of its proper divisors (489610057).

1961575625 is an frugal number, since it uses more digits than its factorization.

1961575625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138541 (or 3138526 counting only the distinct ones).

The product of its digits is 567000, while the sum is 47.

The square root of 1961575625 is about 44289.6785380070. The cubic root of 1961575625 is about 1251.8002061616.

The spelling of 1961575625 in words is "one billion, nine hundred sixty-one million, five hundred seventy-five thousand, six hundred twenty-five".