81053735274 has 12 divisors (see below), whose sum is σ = 175616426466. Its totient is φ = 27017911752.

The previous prime is 81053735263. The next prime is 81053735291. The reversal of 81053735274 is 47253735018.

81053735274 is a `hidden beast` number, since 8 + 1 + 0 + 5 + 373 + 5 + 274 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53312501025 + 27741234249 = 230895^2 + 166557^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2251492629 + ... + 2251492664.

Almost surely, 2^81053735274 is an apocalyptic number.

81053735274 is an abundant number, since it is smaller than the sum of its proper divisors (94562691192).

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

81053735274 is a wasteful number, since it uses less digits than its factorization.

81053735274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502985301 (or 4502985298 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

It can be divided in two parts, 81053735 and 274, that added together give a square (81054009 = 9003²).

The spelling of 81053735274 in words is "eighty-one billion, fifty-three million, seven hundred thirty-five thousand, two hundred seventy-four".