71379455440 has 20 divisors (see below), whose sum is σ = 165957234084. Its totient is φ = 28551782144.

The previous prime is 71379455423. The next prime is 71379455597. The reversal of 71379455440 is 4455497317.

It can be written as a sum of positive squares in 2 ways, for example, as 16039715904 + 55339739536 = 126648^2 + 235244^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446121517 + ... + 446121676.

Almost surely, 2^71379455440 is an apocalyptic number.

It is an amenable number.

71379455440 is an abundant number, since it is smaller than the sum of its proper divisors (94577778644).

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

71379455440 is a wasteful number, since it uses less digits than its factorization.

71379455440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892243206 (or 892243200 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 71379455440 in words is "seventy-one billion, three hundred seventy-nine million, four hundred fifty-five thousand, four hundred forty".