7157840414521 has 2 divisors, whose sum is σ = 7157840414522. Its totient is φ = 7157840414520.

The previous prime is 7157840414513. The next prime is 7157840414573. The reversal of 7157840414521 is 1254140487517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5100207956496 + 2057632458025 = 2258364^2 + 1434445^2 .

It is a cyclic number.

It is not a de Polignac number, because 7157840414521 - 2³ = 7157840414513 is a prime.

It is a super-2 number, since 2×7157840414521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7157840414821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3578920207260 + 3578920207261.

It is an arithmetic number, because the mean of its divisors is an integer number (3578920207261).

Almost surely, 2^{7157840414521} is an apocalyptic number.

It is an amenable number.

7157840414521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7157840414521 is an equidigital number, since it uses as much as digits as its factorization.

7157840414521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1254400, while the sum is 49.

The spelling of 7157840414521 in words is "seven trillion, one hundred fifty-seven billion, eight hundred forty million, four hundred fourteen thousand, five hundred twenty-one".