2130780557 has 2 divisors, whose sum is σ = 2130780558. Its totient is φ = 2130780556.

The previous prime is 2130780551. The next prime is 2130780583. The reversal of 2130780557 is 7550870312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1779068041 + 351712516 = 42179^2 + 18754^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130780557 - 2²⁸ = 1862345101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2130780557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130780551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065390278 + 1065390279.

It is an arithmetic number, because the mean of its divisors is an integer number (1065390279).

Almost surely, 2^2130780557 is an apocalyptic number.

It is an amenable number.

2130780557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130780557 is an equidigital number, since it uses as much as digits as its factorization.

2130780557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 2130780557 is about 46160.3786487936. The cubic root of 2130780557 is about 1286.8054998503.

The spelling of 2130780557 in words is "two billion, one hundred thirty million, seven hundred eighty thousand, five hundred fifty-seven".