7452624640781 has 2 divisors, whose sum is σ = 7452624640782. Its totient is φ = 7452624640780.

The previous prime is 7452624640729. The next prime is 7452624640789. The reversal of 7452624640781 is 1870464262547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6809276272681 + 643348368100 = 2609459^2 + 802090^2 .

It is a cyclic number.

It is not a de Polignac number, because 7452624640781 - 2¹⁸ = 7452624378637 is a prime.

It is a super-2 number, since 2×7452624640781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7452624640789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3726312320390 + 3726312320391.

It is an arithmetic number, because the mean of its divisors is an integer number (3726312320391).

Almost surely, 2^{7452624640781} is an apocalyptic number.

It is an amenable number.

7452624640781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7452624640781 is an equidigital number, since it uses as much as digits as its factorization.

7452624640781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18063360, while the sum is 56.

The spelling of 7452624640781 in words is "seven trillion, four hundred fifty-two billion, six hundred twenty-four million, six hundred forty thousand, seven hundred eighty-one".