78297789761 has 8 divisors (see below), whose sum is σ = 78364657920. Its totient is φ = 78230954448.

The previous prime is 78297789671. The next prime is 78297789827. The reversal of 78297789761 is 16798779287.

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 78297789761 - 2¹⁸ = 78297527617 is a prime.

It is a super-3 number, since 3×78297789761³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78297389761) 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, 7120910 + ... + 7131896.

It is an arithmetic number, because the mean of its divisors is an integer number (9795582240).

Almost surely, 2^78297789761 is an apocalyptic number.

It is an amenable number.

78297789761 is a deficient number, since it is larger than the sum of its proper divisors (66868159).

78297789761 is a wasteful number, since it uses less digits than its factorization.

78297789761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16423.

The product of its digits is 149361408, while the sum is 71.

The spelling of 78297789761 in words is "seventy-eight billion, two hundred ninety-seven million, seven hundred eighty-nine thousand, seven hundred sixty-one".