78253511459 has 2 divisors, whose sum is σ = 78253511460. Its totient is φ = 78253511458.

The previous prime is 78253511437. The next prime is 78253511591. The reversal of 78253511459 is 95411535287.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78253511459 is a prime.

It is a super-2 number, since 2×78253511459² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78253531459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39126755729 + 39126755730.

It is an arithmetic number, because the mean of its divisors is an integer number (39126755730).

Almost surely, 2^78253511459 is an apocalyptic number.

78253511459 is a deficient number, since it is larger than the sum of its proper divisors (1).

78253511459 is an equidigital number, since it uses as much as digits as its factorization.

78253511459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 50.

The spelling of 78253511459 in words is "seventy-eight billion, two hundred fifty-three million, five hundred eleven thousand, four hundred fifty-nine".