199157040956 has 96 divisors (see below), whose sum is σ = 388677273600. Its totient is φ = 88902696960.

The previous prime is 199157040949. The next prime is 199157040967. The reversal of 199157040956 is 659040751991.

It is a super-2 number, since 2×199157040956² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35758940 + ... + 35764508.

It is an arithmetic number, because the mean of its divisors is an integer number (4048721600).

Almost surely, 2^199157040956 is an apocalyptic number.

It is an amenable number.

199157040956 is a deficient number, since it is larger than the sum of its proper divisors (189520232644).

199157040956 is a wasteful number, since it uses less digits than its factorization.

199157040956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019 (or 6017 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 56.

The spelling of 199157040956 in words is "one hundred ninety-nine billion, one hundred fifty-seven million, forty thousand, nine hundred fifty-six".