83815857400 has 48 divisors (see below), whose sum is σ = 212587498440. Its totient is φ = 30478492800.

The previous prime is 83815857373. The next prime is 83815857407. The reversal of 83815857400 is 475851838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83815857407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19046859 + ... + 19051258.

Almost surely, 2^83815857400 is an apocalyptic number.

It is an amenable number.

83815857400 is an abundant number, since it is smaller than the sum of its proper divisors (128771641040).

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

83815857400 is a wasteful number, since it uses less digits than its factorization.

83815857400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38098144 (or 38098135 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 83815857400 in words is "eighty-three billion, eight hundred fifteen million, eight hundred fifty-seven thousand, four hundred".