72105952017455 has 16 divisors (see below), whose sum is σ = 86865260718720. Its totient is φ = 57459501383328.

The previous prime is 72105952017433. The next prime is 72105952017497. The reversal of 72105952017455 is 55471025950127.

It is a cyclic number.

It is not a de Polignac number, because 72105952017455 - 2⁶ = 72105952017391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72105952017397 and 72105952017406.

It is a congruent number.

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, 5700065 + ... + 13292954.

It is an arithmetic number, because the mean of its divisors is an integer number (5429078794920).

Almost surely, 2^{72105952017455} is an apocalyptic number.

72105952017455 is a deficient number, since it is larger than the sum of its proper divisors (14759308701265).

72105952017455 is a wasteful number, since it uses less digits than its factorization.

72105952017455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18995990.

The product of its (nonzero) digits is 4410000, while the sum is 53.

The spelling of 72105952017455 in words is "seventy-two trillion, one hundred five billion, nine hundred fifty-two million, seventeen thousand, four hundred fifty-five".