83278257580 has 24 divisors (see below), whose sum is σ = 199867818528. Its totient is φ = 28552545408.

The previous prime is 83278257563. The next prime is 83278257599. The reversal of 83278257580 is 8575287238.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297422209 + ... + 297422488.

It is an arithmetic number, because the mean of its divisors is an integer number (8327825772).

Almost surely, 2^83278257580 is an apocalyptic number.

It is an amenable number.

83278257580 is an abundant number, since it is smaller than the sum of its proper divisors (116589560948).

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

83278257580 is a wasteful number, since it uses less digits than its factorization.

83278257580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594844713 (or 594844711 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 55.

The spelling of 83278257580 in words is "eighty-three billion, two hundred seventy-eight million, two hundred fifty-seven thousand, five hundred eighty".