81761592201 has 8 divisors (see below), whose sum is σ = 109019514144. Its totient is φ = 54505699200.

The previous prime is 81761592181. The next prime is 81761592217. The reversal of 81761592201 is 10229516718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81761592201 - 2⁶ = 81761592137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81761592271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410575 + ... + 576276.

It is an arithmetic number, because the mean of its divisors is an integer number (13627439268).

Almost surely, 2^81761592201 is an apocalyptic number.

It is an amenable number.

81761592201 is a deficient number, since it is larger than the sum of its proper divisors (27257921943).

81761592201 is a wasteful number, since it uses less digits than its factorization.

81761592201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014471.

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 81761592201 in words is "eighty-one billion, seven hundred sixty-one million, five hundred ninety-two thousand, two hundred one".