7612591409 has 2 divisors, whose sum is σ = 7612591410. Its totient is φ = 7612591408.

The previous prime is 7612591397. The next prime is 7612591423. The reversal of 7612591409 is 9041952167.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6010590784 + 1602000625 = 77528^2 + 40025^2 .

It is a cyclic number.

It is not a de Polignac number, because 7612591409 - 2²⁰ = 7611542833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7612591409.

It is not a weakly prime, because it can be changed into another prime (7612591489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3806295704 + 3806295705.

It is an arithmetic number, because the mean of its divisors is an integer number (3806295705).

Almost surely, 2^7612591409 is an apocalyptic number.

It is an amenable number.

7612591409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7612591409 is an equidigital number, since it uses as much as digits as its factorization.

7612591409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 7612591409 is about 87250.1656674645. The cubic root of 7612591409 is about 1967.1803313474.

The spelling of 7612591409 in words is "seven billion, six hundred twelve million, five hundred ninety-one thousand, four hundred nine".