81930452260 has 12 divisors (see below), whose sum is σ = 172053949788. Its totient is φ = 32772180896.

The previous prime is 81930452249. The next prime is 81930452287. The reversal of 81930452260 is 6225403918.

It can be written as a sum of positive squares in 2 ways, for example, as 49949568036 + 31980884224 = 223494^2 + 178832^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048261287 + ... + 2048261326.

It is an arithmetic number, because the mean of its divisors is an integer number (14337829149).

Almost surely, 2^81930452260 is an apocalyptic number.

It is an amenable number.

81930452260 is an abundant number, since it is smaller than the sum of its proper divisors (90123497528).

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

81930452260 is a wasteful number, since it uses less digits than its factorization.

81930452260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096522622 (or 4096522620 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 81930452260 in words is "eighty-one billion, nine hundred thirty million, four hundred fifty-two thousand, two hundred sixty".