83781215140 has 48 divisors (see below), whose sum is σ = 201108362112. Its totient is φ = 28720210176.

The previous prime is 83781215137. The next prime is 83781215143. The reversal of 83781215140 is 4151218738.

It is an interprime number because it is at equal distance from previous prime (83781215137) and next prime (83781215143).

It is a junction number, because it is equal to n+sod(n) for n = 83781215093 and 83781215102.

It is not an unprimeable number, because it can be changed into a prime (83781215143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853224 + ... + 946336.

It is an arithmetic number, because the mean of its divisors is an integer number (4189757544).

Almost surely, 2^83781215140 is an apocalyptic number.

It is an amenable number.

83781215140 is an abundant number, since it is smaller than the sum of its proper divisors (117327146972).

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

83781215140 is a wasteful number, since it uses less digits than its factorization.

83781215140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99556 (or 99554 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 83781215140 in words is "eighty-three billion, seven hundred eighty-one million, two hundred fifteen thousand, one hundred forty".