101778501401 has 8 divisors (see below), whose sum is σ = 102736420104. Its totient is φ = 100824831360.

The previous prime is 101778501323. The next prime is 101778501443. The reversal of 101778501401 is 104105877101.

It can be written as a sum of positive squares in 4 ways, for example, as 1130304400 + 100648197001 = 33620^2 + 317251^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101778501401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101778551401) 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, 1014020 + ... + 1109861.

It is an arithmetic number, because the mean of its divisors is an integer number (12842052513).

Almost surely, 2^101778501401 is an apocalyptic number.

It is an amenable number.

101778501401 is a deficient number, since it is larger than the sum of its proper divisors (957918703).

101778501401 is a wasteful number, since it uses less digits than its factorization.

101778501401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124331.

The product of its (nonzero) digits is 7840, while the sum is 35.

The spelling of 101778501401 in words is "one hundred one billion, seven hundred seventy-eight million, five hundred one thousand, four hundred one".