172203928508 has 6 divisors (see below), whose sum is σ = 301356874896. Its totient is φ = 86101964252.

The previous prime is 172203928493. The next prime is 172203928517. The reversal of 172203928508 is 805829302271.

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, 21525491060 + ... + 21525491067.

It is an arithmetic number, because the mean of its divisors is an integer number (50226145816).

Almost surely, 2^172203928508 is an apocalyptic number.

It is an amenable number.

172203928508 is a deficient number, since it is larger than the sum of its proper divisors (129152946388).

172203928508 is a wasteful number, since it uses less digits than its factorization.

172203928508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43050982131 (or 43050982129 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 172203928508 in words is "one hundred seventy-two billion, two hundred three million, nine hundred twenty-eight thousand, five hundred eight".