1982125601 has 2 divisors, whose sum is σ = 1982125602. Its totient is φ = 1982125600.

The previous prime is 1982125577. The next prime is 1982125661. The reversal of 1982125601 is 1065212891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1833894976 + 148230625 = 42824^2 + 12175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982125601 is a prime.

It is a super-2 number, since 2×1982125601² = 7857643796279222402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1982125661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991062800 + 991062801.

It is an arithmetic number, because the mean of its divisors is an integer number (991062801).

Almost surely, 2^1982125601 is an apocalyptic number.

It is an amenable number.

1982125601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982125601 is an equidigital number, since it uses as much as digits as its factorization.

1982125601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 1982125601 is about 44521.0691807823. The cubic root of 1982125601 is about 1256.1564238574.

The spelling of 1982125601 in words is "one billion, nine hundred eighty-two million, one hundred twenty-five thousand, six hundred one".