81878395300 has 72 divisors (see below), whose sum is σ = 192050402432. Its totient is φ = 30120336000.

The previous prime is 81878395283. The next prime is 81878395301. The reversal of 81878395300 is 359387818.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (81878395301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236095 + ... + 468505.

Almost surely, 2^81878395300 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81878395300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96025201216).

81878395300 is an abundant number, since it is smaller than the sum of its proper divisors (110172007132).

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

81878395300 is a wasteful number, since it uses less digits than its factorization.

81878395300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232709 (or 232702 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 81878395300 in words is "eighty-one billion, eight hundred seventy-eight million, three hundred ninety-five thousand, three hundred".