72407547017755 has 16 divisors (see below), whose sum is σ = 87394667894784. Its totient is φ = 57589315348320.

The previous prime is 72407547017717. The next prime is 72407547017833. The reversal of 72407547017755 is 55771074570427.

It is not a de Polignac number, because 72407547017755 - 2¹¹ = 72407547015707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72407547017693 and 72407547017702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20356689 + ... + 23647618.

It is an arithmetic number, because the mean of its divisors is an integer number (5462166743424).

Almost surely, 2^{72407547017755} is an apocalyptic number.

72407547017755 is a deficient number, since it is larger than the sum of its proper divisors (14987120877029).

72407547017755 is a wasteful number, since it uses less digits than its factorization.

72407547017755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44006226.

The product of its (nonzero) digits is 67228000, while the sum is 61.

The spelling of 72407547017755 in words is "seventy-two trillion, four hundred seven billion, five hundred forty-seven million, seventeen thousand, seven hundred fifty-five".