72143578642954 has 16 divisors (see below), whose sum is σ = 133188145187328. Its totient is φ = 28540316825712.

The previous prime is 72143578642931. The next prime is 72143578642981. The reversal of 72143578642954 is 45924687534127.

It is a super-2 number, since 2×72143578642954² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72143578642954.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198196644442 + ... + 198196644805.

It is an arithmetic number, because the mean of its divisors is an integer number (8324259074208).

Almost surely, 2^{72143578642954} is an apocalyptic number.

72143578642954 is a deficient number, since it is larger than the sum of its proper divisors (61044566544374).

72143578642954 is a wasteful number, since it uses less digits than its factorization.

72143578642954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396393289269.

The product of its digits is 406425600, while the sum is 67.

The spelling of 72143578642954 in words is "seventy-two trillion, one hundred forty-three billion, five hundred seventy-eight million, six hundred forty-two thousand, nine hundred fifty-four".