78625225025819 has 16 divisors (see below), whose sum is σ = 84808654128000. Its totient is φ = 72665596560960.

The previous prime is 78625225025713. The next prime is 78625225025843. The reversal of 78625225025819 is 91852052252687.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78625225025819 - 2²⁸ = 78624956590363 is a prime.

It is a super-2 number, since 2×78625225025819² (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 (78625225015819) 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 15 ways as a sum of consecutive naturals, for example, 267557234 + ... + 267850935.

It is an arithmetic number, because the mean of its divisors is an integer number (5300540883000).

Almost surely, 2^{78625225025819} is an apocalyptic number.

78625225025819 is a deficient number, since it is larger than the sum of its proper divisors (6183429102181).

78625225025819 is a wasteful number, since it uses less digits than its factorization.

78625225025819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535408378.

The product of its (nonzero) digits is 48384000, while the sum is 62.

The spelling of 78625225025819 in words is "seventy-eight trillion, six hundred twenty-five billion, two hundred twenty-five million, twenty-five thousand, eight hundred nineteen".