78028250025 has 24 divisors (see below), whose sum is σ = 140734590624. Its totient is φ = 37831878400.

The previous prime is 78028249991. The next prime is 78028250033. The reversal of 78028250025 is 52005282087.

It is a happy number.

It is not a de Polignac number, because 78028250025 - 2¹⁰ = 78028249001 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47289024 + ... + 47290673.

It is an arithmetic number, because the mean of its divisors is an integer number (5863941276).

Almost surely, 2^78028250025 is an apocalyptic number.

78028250025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78028250025 is a deficient number, since it is larger than the sum of its proper divisors (62706340599).

78028250025 is a wasteful number, since it uses less digits than its factorization.

78028250025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94579721 (or 94579716 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The spelling of 78028250025 in words is "seventy-eight billion, twenty-eight million, two hundred fifty thousand, twenty-five".