78535919297 has 8 divisors (see below), whose sum is σ = 85757079072. Its totient is φ = 71328348000.

The previous prime is 78535919279. The next prime is 78535919309. The reversal of 78535919297 is 79291953587.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78535919297 - 2⁸ = 78535919041 is a prime.

It is a super-4 number, since 4×78535919297⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78535919237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3385028 + ... + 3408149.

It is an arithmetic number, because the mean of its divisors is an integer number (10719634884).

Almost surely, 2^78535919297 is an apocalyptic number.

It is an amenable number.

78535919297 is a deficient number, since it is larger than the sum of its proper divisors (7221159775).

78535919297 is a wasteful number, since it uses less digits than its factorization.

78535919297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6794239.

The product of its digits is 42865200, while the sum is 65.

The spelling of 78535919297 in words is "seventy-eight billion, five hundred thirty-five million, nine hundred nineteen thousand, two hundred ninety-seven".