72143139509494 has 4 divisors (see below), whose sum is σ = 108214709264244. Its totient is φ = 36071569754746.

The previous prime is 72143139509459. The next prime is 72143139509527. The reversal of 72143139509494 is 49490593134127.

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

It is a super-2 number, since 2×72143139509494² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18035784877372 + ... + 18035784877375.

It is an arithmetic number, because the mean of its divisors is an integer number (27053677316061).

Almost surely, 2^{72143139509494} is an apocalyptic number.

72143139509494 is a deficient number, since it is larger than the sum of its proper divisors (36071569754750).

72143139509494 is a wasteful number, since it uses less digits than its factorization.

72143139509494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36071569754749.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 72143139509494 in words is "seventy-two trillion, one hundred forty-three billion, one hundred thirty-nine million, five hundred nine thousand, four hundred ninety-four".