1572040563581 has 2 divisors, whose sum is σ = 1572040563582. Its totient is φ = 1572040563580.

The previous prime is 1572040563553. The next prime is 1572040563713. The reversal of 1572040563581 is 1853650402751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200317448100 + 371723115481 = 1095590^2 + 609691^2 .

It is a cyclic number.

It is not a de Polignac number, because 1572040563581 - 2⁶ = 1572040563517 is a prime.

It is a super-2 number, since 2×1572040563581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1572040563781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786020281790 + 786020281791.

It is an arithmetic number, because the mean of its divisors is an integer number (786020281791).

Almost surely, 2^{1572040563581} is an apocalyptic number.

It is an amenable number.

1572040563581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1572040563581 is an equidigital number, since it uses as much as digits as its factorization.

1572040563581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 1572040563581 in words is "one trillion, five hundred seventy-two billion, forty million, five hundred sixty-three thousand, five hundred eighty-one".