199571178040 has 128 divisors (see below), whose sum is σ = 500688216000. Its totient is φ = 71084740608.

The previous prime is 199571178031. The next prime is 199571178061. The reversal of 199571178040 is 40871175991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19432987 + ... + 19443253.

Almost surely, 2^199571178040 is an apocalyptic number.

199571178040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199571178040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250344108000).

199571178040 is an abundant number, since it is smaller than the sum of its proper divisors (301117037960).

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

199571178040 is a wasteful number, since it uses less digits than its factorization.

199571178040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11609 (or 11605 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 52.

The spelling of 199571178040 in words is "one hundred ninety-nine billion, five hundred seventy-one million, one hundred seventy-eight thousand, forty".