72961048789 has 4 divisors (see below), whose sum is σ = 75314631040. Its totient is φ = 70607466540.

The previous prime is 72961048751. The next prime is 72961048813. The reversal of 72961048789 is 98784016927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72961048789 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 (72961045789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176791079 + ... + 1176791140.

It is an arithmetic number, because the mean of its divisors is an integer number (18828657760).

Almost surely, 2^72961048789 is an apocalyptic number.

It is an amenable number.

72961048789 is a deficient number, since it is larger than the sum of its proper divisors (2353582251).

72961048789 is a wasteful number, since it uses less digits than its factorization.

72961048789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353582250.

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 72961048789 in words is "seventy-two billion, nine hundred sixty-one million, forty-eight thousand, seven hundred eighty-nine".