72784055739 has 8 divisors (see below), whose sum is σ = 97048010752. Its totient is φ = 48521402280.

The previous prime is 72784055693. The next prime is 72784055753. The reversal of 72784055739 is 93755048727.

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

It is not a de Polignac number, because 72784055739 - 2¹⁷ = 72783924667 is a prime.

It is a super-2 number, since 2×72784055739² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72784055759) 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, 186427 + ... + 424644.

It is an arithmetic number, because the mean of its divisors is an integer number (12131001344).

Almost surely, 2^72784055739 is an apocalyptic number.

72784055739 is a deficient number, since it is larger than the sum of its proper divisors (24263955013).

72784055739 is a wasteful number, since it uses less digits than its factorization.

72784055739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650777.

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 72784055739 in words is "seventy-two billion, seven hundred eighty-four million, fifty-five thousand, seven hundred thirty-nine".