101778641 has 8 divisors (see below), whose sum is σ = 104903040. Its totient is φ = 98694288.

The previous prime is 101778637. The next prime is 101778647. The reversal of 101778641 is 146877101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101778641 - 2² = 101778637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (101778647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4811 + ... + 15056.

It is an arithmetic number, because the mean of its divisors is an integer number (13112880).

Almost surely, 2^101778641 is an apocalyptic number.

It is an amenable number.

101778641 is a deficient number, since it is larger than the sum of its proper divisors (3124399).

101778641 is a wasteful number, since it uses less digits than its factorization.

101778641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20023.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 101778641 is about 10088.5400826879. The cubic root of 101778641 is about 466.8946339144.

The spelling of 101778641 in words is "one hundred one million, seven hundred seventy-eight thousand, six hundred forty-one".