75878049840 has 80 divisors (see below), whose sum is σ = 235737004128. Its totient is φ = 20189841408.

The previous prime is 75878049829. The next prime is 75878049853. The reversal of 75878049840 is 4894087857.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236227 + ... + 455586.

Almost surely, 2^75878049840 is an apocalyptic number.

It is an amenable number.

75878049840 is an abundant number, since it is smaller than the sum of its proper divisors (159858954288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75878049840 is a wasteful number, since it uses less digits than its factorization.

75878049840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692286 (or 692280 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 75878049840 in words is "seventy-five billion, eight hundred seventy-eight million, forty-nine thousand, eight hundred forty".