8742121672 has 32 divisors (see below), whose sum is σ = 16607894400. Its totient is φ = 4313409984.

The previous prime is 8742121669. The next prime is 8742121691. The reversal of 8742121672 is 2761212478.

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, 2300478 + ... + 2304274.

It is an arithmetic number, because the mean of its divisors is an integer number (518996700).

Almost surely, 2^8742121672 is an apocalyptic number.

It is an amenable number.

8742121672 is a deficient number, since it is larger than the sum of its proper divisors (7865772728).

8742121672 is a wasteful number, since it uses less digits than its factorization.

8742121672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7525 (or 7521 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 8742121672 is about 93499.3137514923. The cubic root of 8742121672 is about 2060.0240101515.

The spelling of 8742121672 in words is "eight billion, seven hundred forty-two million, one hundred twenty-one thousand, six hundred seventy-two".