72673055501 has 4 divisors (see below), whose sum is σ = 72758253372. Its totient is φ = 72587857632.

The previous prime is 72673055479. The next prime is 72673055549. The reversal of 72673055501 is 10555037627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1224300100 + 71448755401 = 34990^2 + 267299^2 .

It is a cyclic number.

It is not a de Polignac number, because 72673055501 - 2¹⁰ = 72673054477 is a prime.

It is a super-2 number, since 2×72673055501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72673055101) 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, 42597656 + ... + 42599361.

It is an arithmetic number, because the mean of its divisors is an integer number (18189563343).

Almost surely, 2^72673055501 is an apocalyptic number.

It is an amenable number.

72673055501 is a deficient number, since it is larger than the sum of its proper divisors (85197871).

72673055501 is an equidigital number, since it uses as much as digits as its factorization.

72673055501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85197870.

The product of its (nonzero) digits is 220500, while the sum is 41.

The spelling of 72673055501 in words is "seventy-two billion, six hundred seventy-three million, fifty-five thousand, five hundred one".