81560487540270 has 32 divisors (see below), whose sum is σ = 195745670064288. Its totient is φ = 21749407792128.

The previous prime is 81560487540211. The next prime is 81560487540347. The reversal of 81560487540270 is 7204578406518.

It is a super-2 number, since 2×81560487540270² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81560487540270.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9231162 + ... + 15758658.

It is an arithmetic number, because the mean of its divisors is an integer number (6117052189509).

Almost surely, 2^{81560487540270} is an apocalyptic number.

81560487540270 is an abundant number, since it is smaller than the sum of its proper divisors (114185182524018).

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

81560487540270 is a wasteful number, since it uses less digits than its factorization.

81560487540270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944004.

The product of its (nonzero) digits is 15052800, while the sum is 57.

The spelling of 81560487540270 in words is "eighty-one trillion, five hundred sixty billion, four hundred eighty-seven million, five hundred forty thousand, two hundred seventy".