861951472101 has 6 divisors (see below), whose sum is σ = 1245041015270. Its totient is φ = 574634314728.

The previous prime is 861951472093. The next prime is 861951472111. The reversal of 861951472101 is 101274159168.

861951472101 is a `hidden beast` number, since 8 + 61 + 9 + 514 + 72 + 1 + 0 + 1 = 666.

861951472101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 716310015201 + 145641456900 = 846351^2 + 381630^2 .

It is not a de Polignac number, because 861951472101 - 2³ = 861951472093 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 (861951472111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47886192886 + ... + 47886192903.

Almost surely, 2^861951472101 is an apocalyptic number.

It is an amenable number.

861951472101 is a deficient number, since it is larger than the sum of its proper divisors (383089543169).

861951472101 is a wasteful number, since it uses less digits than its factorization.

861951472101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95772385795 (or 95772385792 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 861951472101 in words is "eight hundred sixty-one billion, nine hundred fifty-one million, four hundred seventy-two thousand, one hundred one".