72190515989 has 4 divisors (see below), whose sum is σ = 72260401356. Its totient is φ = 72120630624.

The previous prime is 72190515967. The next prime is 72190516007. The reversal of 72190515989 is 98951509127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44191187089 + 27999328900 = 210217^2 + 167330^2 .

It is a cyclic number.

It is not a de Polignac number, because 72190515989 - 2¹² = 72190511893 is a prime.

It is a super-2 number, since 2×72190515989² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72190515919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34941134 + ... + 34943199.

It is an arithmetic number, because the mean of its divisors is an integer number (18065100339).

Almost surely, 2^72190515989 is an apocalyptic number.

It is an amenable number.

72190515989 is a deficient number, since it is larger than the sum of its proper divisors (69885367).

72190515989 is a wasteful number, since it uses less digits than its factorization.

72190515989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69885366.

The product of its (nonzero) digits is 2041200, while the sum is 56.

The spelling of 72190515989 in words is "seventy-two billion, one hundred ninety million, five hundred fifteen thousand, nine hundred eighty-nine".