81419181702 has 32 divisors (see below), whose sum is σ = 163464998400. Its totient is φ = 27035449728.

The previous prime is 81419181677. The next prime is 81419181721. The reversal of 81419181702 is 20718191418.

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, 2063374 + ... + 2102462.

It is an arithmetic number, because the mean of its divisors is an integer number (5108281200).

Almost surely, 2^81419181702 is an apocalyptic number.

81419181702 is an abundant number, since it is smaller than the sum of its proper divisors (82045816698).

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

81419181702 is a wasteful number, since it uses less digits than its factorization.

81419181702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40420.

The product of its (nonzero) digits is 32256, while the sum is 42.

The spelling of 81419181702 in words is "eighty-one billion, four hundred nineteen million, one hundred eighty-one thousand, seven hundred two".