101778625001 has 4 divisors (see below), whose sum is σ = 101783950404. Its totient is φ = 101773299600.

The previous prime is 101778624991. The next prime is 101778625027. The reversal of 101778625001 is 100526877101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63127065001 + 38651560000 = 251251^2 + 196600^2 .

It is a cyclic number.

It is not a de Polignac number, because 101778625001 - 2³⁰ = 100704883177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101778625051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2633930 + ... + 2672291.

It is an arithmetic number, because the mean of its divisors is an integer number (25445987601).

Almost surely, 2^101778625001 is an apocalyptic number.

It is an amenable number.

101778625001 is a deficient number, since it is larger than the sum of its proper divisors (5325403).

101778625001 is an equidigital number, since it uses as much as digits as its factorization.

101778625001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5325402.

The product of its (nonzero) digits is 23520, while the sum is 38.

The spelling of 101778625001 in words is "one hundred one billion, seven hundred seventy-eight million, six hundred twenty-five thousand, one".