78717977763 has 8 divisors (see below), whose sum is σ = 104976608448. Its totient is φ = 52468999464.

The previous prime is 78717977753. The next prime is 78717977827. The reversal of 78717977763 is 36777971787.

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

It is not a de Polignac number, because 78717977763 - 2⁵ = 78717977731 is a prime.

It is a super-3 number, since 3×78717977763³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (78717977713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2394045 + ... + 2426702.

It is an arithmetic number, because the mean of its divisors is an integer number (13122076056).

Almost surely, 2^78717977763 is an apocalyptic number.

78717977763 is a deficient number, since it is larger than the sum of its proper divisors (26258630685).

78717977763 is a wasteful number, since it uses less digits than its factorization.

78717977763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826193.

The product of its digits is 152473104, while the sum is 69.

The spelling of 78717977763 in words is "seventy-eight billion, seven hundred seventeen million, nine hundred seventy-seven thousand, seven hundred sixty-three".