72019658893 has 54 divisors (see below), whose sum is σ = 93499305102. Its totient is φ = 55144439280.

The previous prime is 72019658873. The next prime is 72019658899. The reversal of 72019658893 is 39885691027.

It can be written as a sum of positive squares in only one way, i.e., 49859763849 + 22159895044 = 223293^2 + 148862^2 .

It is not a de Polignac number, because 72019658893 - 2¹³ = 72019650701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72019658899) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2323214788 + ... + 2323214818.

It is an arithmetic number, because the mean of its divisors is an integer number (1731468613).

Almost surely, 2^72019658893 is an apocalyptic number.

It is an amenable number.

72019658893 is a deficient number, since it is larger than the sum of its proper divisors (21479646209).

72019658893 is an frugal number, since it uses more digits than its factorization.

72019658893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 72019658893 in words is "seventy-two billion, nineteen million, six hundred fifty-eight thousand, eight hundred ninety-three".