101040246640 has 80 divisors (see below), whose sum is σ = 249278420160. Its totient is φ = 37955932160.

The previous prime is 101040246569. The next prime is 101040246647. The reversal of 101040246640 is 46642040101.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 101040246599 and 101040246608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101040246647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546381 + ... + 707539.

It is an arithmetic number, because the mean of its divisors is an integer number (3115980252).

Almost surely, 2^101040246640 is an apocalyptic number.

101040246640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101040246640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124639210080).

101040246640 is an abundant number, since it is smaller than the sum of its proper divisors (148238173520).

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

101040246640 is a wasteful number, since it uses less digits than its factorization.

101040246640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161650 (or 161644 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 101040246640 its reverse (46642040101), we get a palindrome (147682286741).

The spelling of 101040246640 in words is "one hundred one billion, forty million, two hundred forty-six thousand, six hundred forty".