78083308025251 has 4 divisors (see below), whose sum is σ = 78083860745752. Its totient is φ = 78082755304752.

The previous prime is 78083308025227. The next prime is 78083308025293. The reversal of 78083308025251 is 15252080338087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78083308025251 - 2¹⁵ = 78083307992483 is a prime.

It is a super-2 number, since 2×78083308025251² (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 (78083308025851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276148290 + ... + 276430903.

It is an arithmetic number, because the mean of its divisors is an integer number (19520965186438).

Almost surely, 2^{78083308025251} is an apocalyptic number.

78083308025251 is a deficient number, since it is larger than the sum of its proper divisors (552720501).

78083308025251 is a wasteful number, since it uses less digits than its factorization.

78083308025251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552720500.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 78083308025251 in words is "seventy-eight trillion, eighty-three billion, three hundred eight million, twenty-five thousand, two hundred fifty-one".