71321771154 has 32 divisors (see below), whose sum is σ = 146172237120. Its totient is φ = 23186201600.

The previous prime is 71321771153. The next prime is 71321771159. The reversal of 71321771154 is 45117712317.

It is not an unprimeable number, because it can be changed into a prime (71321771153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700417 + ... + 795755.

It is an arithmetic number, because the mean of its divisors is an integer number (4567882410).

Almost surely, 2^71321771154 is an apocalyptic number.

71321771154 is an abundant number, since it is smaller than the sum of its proper divisors (74850465966).

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

71321771154 is a wasteful number, since it uses less digits than its factorization.

71321771154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98426.

The product of its digits is 41160, while the sum is 39.

The spelling of 71321771154 in words is "seventy-one billion, three hundred twenty-one million, seven hundred seventy-one thousand, one hundred fifty-four".