81341437070 has 16 divisors (see below), whose sum is σ = 147836089440. Its totient is φ = 32220685344.

The previous prime is 81341437069. The next prime is 81341437097. The reversal of 81341437070 is 7073414318.

It is a super-2 number, since 2×81341437070² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39485105 + ... + 39487164.

It is an arithmetic number, because the mean of its divisors is an integer number (9239755590).

Almost surely, 2^81341437070 is an apocalyptic number.

81341437070 is a deficient number, since it is larger than the sum of its proper divisors (66494652370).

81341437070 is a wasteful number, since it uses less digits than its factorization.

81341437070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78972379.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 81341437070 in words is "eighty-one billion, three hundred forty-one million, four hundred thirty-seven thousand, seventy".