190400642261 has 4 divisors (see below), whose sum is σ = 190414017024. Its totient is φ = 190387267500.

The previous prime is 190400642249. The next prime is 190400642279. The reversal of 190400642261 is 162246004091.

190400642261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 190400642261 - 2²² = 190396447957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190400642221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6666005 + ... + 6694506.

It is an arithmetic number, because the mean of its divisors is an integer number (47603504256).

Almost surely, 2^190400642261 is an apocalyptic number.

It is an amenable number.

190400642261 is a deficient number, since it is larger than the sum of its proper divisors (13374763).

190400642261 is a wasteful number, since it uses less digits than its factorization.

190400642261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13374762.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 190400642261 in words is "one hundred ninety billion, four hundred million, six hundred forty-two thousand, two hundred sixty-one".