199673208926464 has 144 divisors (see below), whose sum is σ = 511871287802112. Its totient is φ = 75557181579264.

The previous prime is 199673208926419. The next prime is 199673208926479. The reversal of 199673208926464 is 464629802376991.

It is a super-2 number, since 2×199673208926464² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185793259 + ... + 186864874.

It is an arithmetic number, because the mean of its divisors is an integer number (3554661720848).

Almost surely, 2^{199673208926464} is an apocalyptic number.

199673208926464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

199673208926464 is an abundant number, since it is smaller than the sum of its proper divisors (312198078875648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199673208926464 is a wasteful number, since it uses less digits than its factorization.

199673208926464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372658192 (or 372658178 counting only the distinct ones).

The product of its (nonzero) digits is 1693052928, while the sum is 76.

The spelling of 199673208926464 in words is "one hundred ninety-nine trillion, six hundred seventy-three billion, two hundred eight million, nine hundred twenty-six thousand, four hundred sixty-four".