191690261142 has 16 divisors (see below), whose sum is σ = 383420453040. Its totient is φ = 63890098592.

The previous prime is 191690261137. The next prime is 191690261179. The reversal of 191690261142 is 241162096191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 191690261094 and 191690261103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601193 + ... + 1716740.

It is an arithmetic number, because the mean of its divisors is an integer number (23963778315).

Almost surely, 2^191690261142 is an apocalyptic number.

191690261142 is an abundant number, since it is smaller than the sum of its proper divisors (191730191898).

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

191690261142 is a wasteful number, since it uses less digits than its factorization.

191690261142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327567.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 191690261142 in words is "one hundred ninety-one billion, six hundred ninety million, two hundred sixty-one thousand, one hundred forty-two".