630750180764281 has 4 divisors (see below), whose sum is σ = 633027257229412. Its totient is φ = 628473104299152.

The previous prime is 630750180764261. The next prime is 630750180764299. The reversal of 630750180764281 is 182467081057036.

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

It can be written as a sum of positive squares in 2 ways, for example, as 400594580789881 + 230155599974400 = 20014859^2 + 15170880^2 .

It is a cyclic number.

It is not a de Polignac number, because 630750180764281 - 2⁴⁵ = 595565808675449 is a prime.

It is a super-2 number, since 2×630750180764281² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630750180764261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138538232150 + ... + 1138538232703.

It is an arithmetic number, because the mean of its divisors is an integer number (158256814307353).

Almost surely, 2^{630750180764281} is an apocalyptic number.

It is an amenable number.

630750180764281 is a deficient number, since it is larger than the sum of its proper divisors (2277076465131).

630750180764281 is a wasteful number, since it uses less digits than its factorization.

630750180764281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277076465130.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 630750180764281 in words is "six hundred thirty trillion, seven hundred fifty billion, one hundred eighty million, seven hundred sixty-four thousand, two hundred eighty-one".