72902657389 has 4 divisors (see below), whose sum is σ = 73624465980. Its totient is φ = 72180848800.

The previous prime is 72902657383. The next prime is 72902657393. The reversal of 72902657389 is 98375620927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98375620927 = 17 ⋅5786801231.

It can be written as a sum of positive squares in 2 ways, for example, as 68178432100 + 4724225289 = 261110^2 + 68733^2 .

It is a cyclic number.

It is not a de Polignac number, because 72902657389 - 2²³ = 72894268781 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 (72902657383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360904144 + ... + 360904345.

It is an arithmetic number, because the mean of its divisors is an integer number (18406116495).

Almost surely, 2^72902657389 is an apocalyptic number.

It is an amenable number.

72902657389 is a deficient number, since it is larger than the sum of its proper divisors (721808591).

72902657389 is a wasteful number, since it uses less digits than its factorization.

72902657389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721808590.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 72902657389 in words is "seventy-two billion, nine hundred two million, six hundred fifty-seven thousand, three hundred eighty-nine".