78794249787 has 36 divisors (see below), whose sum is σ = 126340049472. Its totient is φ = 47281212000.

The previous prime is 78794249777. The next prime is 78794249797.

78794249787 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (78794249777) and next prime (78794249797).

It is not a de Polignac number, because 78794249787 - 2⁸ = 78794249531 is a prime.

It is a super-2 number, since 2×78794249787² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78794249747) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 248203 + ... + 468180.

Almost surely, 2^78794249787 is an apocalyptic number.

78794249787 is a deficient number, since it is larger than the sum of its proper divisors (47545799685).

78794249787 is a wasteful number, since it uses less digits than its factorization.

78794249787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716512 (or 716498 counting only the distinct ones).

The product of its digits is 398297088, while the sum is 72.

The spelling of 78794249787 in words is "seventy-eight billion, seven hundred ninety-four million, two hundred forty-nine thousand, seven hundred eighty-seven".