72738835375 has 16 divisors (see below), whose sum is σ = 90788574240. Its totient is φ = 58184332800.

The previous prime is 72738835373. The next prime is 72738835451. The reversal of 72738835375 is 57353883727.

It is a happy number.

It is not a de Polignac number, because 72738835375 - 2¹ = 72738835373 is a prime.

It is a super-2 number, since 2×72738835375² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72738835373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1243536 + ... + 1300714.

It is an arithmetic number, because the mean of its divisors is an integer number (5674285890).

Almost surely, 2^72738835375 is an apocalyptic number.

72738835375 is a deficient number, since it is larger than the sum of its proper divisors (18049738865).

72738835375 is a wasteful number, since it uses less digits than its factorization.

72738835375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67371 (or 67361 counting only the distinct ones).

The product of its digits is 29635200, while the sum is 58.

The spelling of 72738835375 in words is "seventy-two billion, seven hundred thirty-eight million, eight hundred thirty-five thousand, three hundred seventy-five".