72955977653 has 8 divisors (see below), whose sum is σ = 78596595000. Its totient is φ = 67319448768.

The previous prime is 72955977637. The next prime is 72955977749. The reversal of 72955977653 is 35677955927.

It can be written as a sum of positive squares in 4 ways, for example, as 4333983889 + 68621993764 = 65833^2 + 261958^2 .

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

It is not a de Polignac number, because 72955977653 - 2⁴ = 72955977637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72955977653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72955977553) 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, 984998 + ... + 1056471.

It is an arithmetic number, because the mean of its divisors is an integer number (9824574375).

Almost surely, 2^72955977653 is an apocalyptic number.

It is an amenable number.

72955977653 is a deficient number, since it is larger than the sum of its proper divisors (5640617347).

72955977653 is a wasteful number, since it uses less digits than its factorization.

72955977653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044231.

The product of its digits is 125023500, while the sum is 65.

The spelling of 72955977653 in words is "seventy-two billion, nine hundred fifty-five million, nine hundred seventy-seven thousand, six hundred fifty-three".