72540344217061 has 8 divisors (see below), whose sum is σ = 84925281034944. Its totient is φ = 60660915024480.

The previous prime is 72540344217043. The next prime is 72540344217109. The reversal of 72540344217061 is 16071244304527.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72540344217061 - 2²³ = 72540335828453 is a prime.

It is a super-4 number, since 4×72540344217061⁴ (a number of 57 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72540344215061) 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, 126376906015 + ... + 126376906588.

It is an arithmetic number, because the mean of its divisors is an integer number (10615660129368).

Almost surely, 2^{72540344217061} is an apocalyptic number.

It is an amenable number.

72540344217061 is a deficient number, since it is larger than the sum of its proper divisors (12384936817883).

72540344217061 is a wasteful number, since it uses less digits than its factorization.

72540344217061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252753812651.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 72540344217061 in words is "seventy-two trillion, five hundred forty billion, three hundred forty-four million, two hundred seventeen thousand, sixty-one".