10101100644 has 72 divisors (see below), whose sum is σ = 26891198880. Its totient is φ = 3188160000.

The previous prime is 10101100643. The next prime is 10101100661. The reversal of 10101100644 is 44600110101.

10101100644 is a `hidden beast` number, since 1 + 0 + 10 + 1 + 10 + 0 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10101100643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2522644 + ... + 2526644.

Almost surely, 2^10101100644 is an apocalyptic number.

It is an amenable number.

10101100644 is an abundant number, since it is smaller than the sum of its proper divisors (16790098236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10101100644 is a wasteful number, since it uses less digits than its factorization.

10101100644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721 (or 7716 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 10101100644 its reverse (44600110101), we get a palindrome (54701210745).

The spelling of 10101100644 in words is "ten billion, one hundred one million, one hundred thousand, six hundred forty-four".