199272440657 has 16 divisors (see below), whose sum is σ = 217230225408. Its totient is φ = 182237301840.

The previous prime is 199272440623. The next prime is 199272440677. The reversal of 199272440657 is 756044272991.

It is a happy number.

It is not a de Polignac number, because 199272440657 - 2¹⁶ = 199272375121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199272440617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1624463 + ... + 1742820.

It is an arithmetic number, because the mean of its divisors is an integer number (13576889088).

Almost surely, 2^199272440657 is an apocalyptic number.

It is an amenable number.

199272440657 is a deficient number, since it is larger than the sum of its proper divisors (17957784751).

199272440657 is a wasteful number, since it uses less digits than its factorization.

199272440657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367420.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 199272440657 in words is "one hundred ninety-nine billion, two hundred seventy-two million, four hundred forty thousand, six hundred fifty-seven".