72143578642955 has 4 divisors (see below), whose sum is σ = 86572294371552. Its totient is φ = 57714862914360.

The previous prime is 72143578642931. The next prime is 72143578642981. The reversal of 72143578642955 is 55924687534127.

It is a happy number.

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

It is not a de Polignac number, because 72143578642955 - 2¹⁰ = 72143578641931 is a prime.

It is a super-2 number, since 2×72143578642955² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7214357864291 + ... + 7214357864300.

It is an arithmetic number, because the mean of its divisors is an integer number (21643073592888).

Almost surely, 2^{72143578642955} is an apocalyptic number.

72143578642955 is a deficient number, since it is larger than the sum of its proper divisors (14428715728597).

72143578642955 is a wasteful number, since it uses less digits than its factorization.

72143578642955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14428715728596.

The product of its digits is 508032000, while the sum is 68.

The spelling of 72143578642955 in words is "seventy-two trillion, one hundred forty-three billion, five hundred seventy-eight million, six hundred forty-two thousand, nine hundred fifty-five".