1961814425 has 24 divisors (see below), whose sum is σ = 2450322336. Its totient is φ = 1558103040.

The previous prime is 1961814401. The next prime is 1961814431. The reversal of 1961814425 is 5244181691.

It is not a de Polignac number, because 1961814425 - 2¹⁰ = 1961813401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3399737 + ... + 3400313.

It is an arithmetic number, because the mean of its divisors is an integer number (102096764).

Almost surely, 2^1961814425 is an apocalyptic number.

It is an amenable number.

1961814425 is a deficient number, since it is larger than the sum of its proper divisors (488507911).

1961814425 is a wasteful number, since it uses less digits than its factorization.

1961814425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337 (or 1332 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 1961814425 is about 44292.3743436723. The cubic root of 1961814425 is about 1251.8510016813.

It can be divided in two parts, 19618 and 14425, that added together give a palindrome (34043).

The spelling of 1961814425 in words is "one billion, nine hundred sixty-one million, eight hundred fourteen thousand, four hundred twenty-five".