1975977325442 has 4 divisors (see below), whose sum is σ = 2963965988166. Its totient is φ = 987988662720.

The previous prime is 1975977325243. The next prime is 1975977325459. The reversal of 1975977325442 is 2445237795791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1047820424161 + 928156901281 = 1023631^2 + 963409^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493994331359 + ... + 493994331362.

Almost surely, 2^{1975977325442} is an apocalyptic number.

1975977325442 is a deficient number, since it is larger than the sum of its proper divisors (987988662724).

1975977325442 is an equidigital number, since it uses as much as digits as its factorization.

1975977325442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987988662723.

The product of its digits is 133358400, while the sum is 65.

The spelling of 1975977325442 in words is "one trillion, nine hundred seventy-five billion, nine hundred seventy-seven million, three hundred twenty-five thousand, four hundred forty-two".