78358797155801 has 8 divisors (see below), whose sum is σ = 78716492358504. Its totient is φ = 78001371002880.

The previous prime is 78358797155791. The next prime is 78358797155819. The reversal of 78358797155801 is 10855179785387.

It can be written as a sum of positive squares in 4 ways, for example, as 38183736131401 + 40175061024400 = 6179299^2 + 6338380^2 .

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 78358797155801 - 2¹⁰ = 78358797154777 is a prime.

It is a super-2 number, since 2×78358797155801² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78358797155101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66678620 + ... + 67843613.

It is an arithmetic number, because the mean of its divisors is an integer number (9839561544813).

Almost surely, 2^{78358797155801} is an apocalyptic number.

It is an amenable number.

78358797155801 is a deficient number, since it is larger than the sum of its proper divisors (357695202703).

78358797155801 is a wasteful number, since it uses less digits than its factorization.

78358797155801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134524891.

The product of its (nonzero) digits is 592704000, while the sum is 74.

The spelling of 78358797155801 in words is "seventy-eight trillion, three hundred fifty-eight billion, seven hundred ninety-seven million, one hundred fifty-five thousand, eight hundred one".