199402412550 has 48 divisors (see below), whose sum is σ = 539474167872. Its totient is φ = 48339978400.

The previous prime is 199402412527. The next prime is 199402412579. The reversal of 199402412550 is 55214204991.

It is a super-2 number, since 2×199402412550² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60423324 + ... + 60426623.

It is an arithmetic number, because the mean of its divisors is an integer number (11239045164).

Almost surely, 2^199402412550 is an apocalyptic number.

199402412550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199402412550 is an abundant number, since it is smaller than the sum of its proper divisors (340071755322).

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

199402412550 is a wasteful number, since it uses less digits than its factorization.

199402412550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120849973 (or 120849968 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 199402412550 in words is "one hundred ninety-nine billion, four hundred two million, four hundred twelve thousand, five hundred fifty".