78508540425 has 24 divisors (see below), whose sum is σ = 148343757376. Its totient is φ = 35889618240.

The previous prime is 78508540403. The next prime is 78508540499. The reversal of 78508540425 is 52404580587.

It is not a de Polignac number, because 78508540425 - 2¹¹ = 78508538377 is a prime.

It is a Duffinian 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, 74769514 + ... + 74770563.

Almost surely, 2^78508540425 is an apocalyptic number.

78508540425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78508540425 is a deficient number, since it is larger than the sum of its proper divisors (69835216951).

78508540425 is a wasteful number, since it uses less digits than its factorization.

78508540425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149540097 (or 149540092 counting only the distinct ones).

The product of its (nonzero) digits is 1792000, while the sum is 48.

The spelling of 78508540425 in words is "seventy-eight billion, five hundred eight million, five hundred forty thousand, four hundred twenty-five".