78125011497 has 12 divisors (see below), whose sum is σ = 121527795844. Its totient is φ = 48076930080.

The previous prime is 78125011463. The next prime is 78125011507. The reversal of 78125011497 is 79411052187.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4458366441 + 73666645056 = 66771^2 + 271416^2 .

It is not a de Polignac number, because 78125011497 - 2⁷ = 78125011369 is a prime.

It is a super-2 number, since 2×78125011497² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78125011457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333867454 + ... + 333867687.

Almost surely, 2^78125011497 is an apocalyptic number.

It is an amenable number.

78125011497 is a deficient number, since it is larger than the sum of its proper divisors (43402784347).

78125011497 is a wasteful number, since it uses less digits than its factorization.

78125011497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667735160 (or 667735157 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 78125011497 in words is "seventy-eight billion, one hundred twenty-five million, eleven thousand, four hundred ninety-seven".