78408534755 has 8 divisors (see below), whose sum is σ = 94091779872. Its totient is φ = 62725802368.

The previous prime is 78408534739. The next prime is 78408534817. The reversal of 78408534755 is 55743580487.

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 78408534755 - 2⁴ = 78408534739 is a prime.

It is a super-2 number, since 2×78408534755² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78408534755.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426347 + ... + 581883.

It is an arithmetic number, because the mean of its divisors is an integer number (11761472484).

Almost surely, 2^78408534755 is an apocalyptic number.

78408534755 is a deficient number, since it is larger than the sum of its proper divisors (15683245117).

78408534755 is a wasteful number, since it uses less digits than its factorization.

78408534755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256365.

The product of its (nonzero) digits is 18816000, while the sum is 56.

The spelling of 78408534755 in words is "seventy-eight billion, four hundred eight million, five hundred thirty-four thousand, seven hundred fifty-five".