72019078837 has 8 divisors (see below), whose sum is σ = 72968114520. Its totient is φ = 71073150720.

The previous prime is 72019078829. The next prime is 72019078843. The reversal of 72019078837 is 73887091027.

It can be written as a sum of positive squares in 4 ways, for example, as 12331214116 + 59687864721 = 111046^2 + 244311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72019078837 - 2³ = 72019078829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72019018837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730218 + ... + 822955.

It is an arithmetic number, because the mean of its divisors is an integer number (9121014315).

Almost surely, 2^72019078837 is an apocalyptic number.

It is an amenable number.

72019078837 is a deficient number, since it is larger than the sum of its proper divisors (949035683).

72019078837 is a wasteful number, since it uses less digits than its factorization.

72019078837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553783.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The spelling of 72019078837 in words is "seventy-two billion, nineteen million, seventy-eight thousand, eight hundred thirty-seven".