81765026250 has 40 divisors (see below), whose sum is σ = 204347162976. Its totient is φ = 21804006000.

The previous prime is 81765026219. The next prime is 81765026263. The reversal of 81765026250 is 5262056718.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10898254 + ... + 10905753.

Almost surely, 2^81765026250 is an apocalyptic number.

81765026250 is an abundant number, since it is smaller than the sum of its proper divisors (122582136726).

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

81765026250 is a wasteful number, since it uses less digits than its factorization.

81765026250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21804032 (or 21804017 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 81765026250 in words is "eighty-one billion, seven hundred sixty-five million, twenty-six thousand, two hundred fifty".