81502097376 has 192 divisors, whose sum is σ = 249315010560. Its totient is φ = 22832824320.

The previous prime is 81502097371. The next prime is 81502097389. The reversal of 81502097376 is 67379020518.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81502097371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7099321 + ... + 7110791.

It is an arithmetic number, because the mean of its divisors is an integer number (1298515680).

Almost surely, 2^81502097376 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 81502097376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124657505280).

81502097376 is an abundant number, since it is smaller than the sum of its proper divisors (167812913184).

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

81502097376 is a wasteful number, since it uses less digits than its factorization.

81502097376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11697 (or 11689 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 81502097376 in words is "eighty-one billion, five hundred two million, ninety-seven thousand, three hundred seventy-six".