101244326640 has 80 divisors (see below), whose sum is σ = 313978573728. Its totient is φ = 26988064768.

The previous prime is 101244326621. The next prime is 101244326641. The reversal of 101244326640 is 46623442101.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101244326641) 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, 551812 + ... + 712028.

Almost surely, 2^101244326640 is an apocalyptic number.

101244326640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101244326640 is an abundant number, since it is smaller than the sum of its proper divisors (212734247088).

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

101244326640 is a wasteful number, since it uses less digits than its factorization.

101244326640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162866 (or 162860 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 101244326640 its reverse (46623442101), we get a palindrome (147867768741).

The spelling of 101244326640 in words is "one hundred one billion, two hundred forty-four million, three hundred twenty-six thousand, six hundred forty".