83778573488 has 20 divisors (see below), whose sum is σ = 164375684640. Its totient is φ = 41359041984.

The previous prime is 83778573421. The next prime is 83778573491. The reversal of 83778573488 is 88437587738.

It is a super-2 number, since 2×83778573488² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33138995 + ... + 33141522.

It is an arithmetic number, because the mean of its divisors is an integer number (8218784232).

Almost surely, 2^83778573488 is an apocalyptic number.

It is an amenable number.

83778573488 is a deficient number, since it is larger than the sum of its proper divisors (80597111152).

83778573488 is a wasteful number, since it uses less digits than its factorization.

83778573488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66280604 (or 66280598 counting only the distinct ones).

The product of its digits is 252887040, while the sum is 68.

The spelling of 83778573488 in words is "eighty-three billion, seven hundred seventy-eight million, five hundred seventy-three thousand, four hundred eighty-eight".