211101612640 has 96 divisors (see below), whose sum is σ = 545099030784. Its totient is φ = 76909854720.

The previous prime is 211101612613. The next prime is 211101612643. The reversal of 211101612640 is 46216101112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101612643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1167469 + ... + 1336108.

It is an arithmetic number, because the mean of its divisors is an integer number (5678114904).

Almost surely, 2^211101612640 is an apocalyptic number.

211101612640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101612640 is an abundant number, since it is smaller than the sum of its proper divisors (333997418144).

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

211101612640 is a wasteful number, since it uses less digits than its factorization.

211101612640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503640 (or 2503632 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 211101612640 its reverse (46216101112), we get a palindrome (257317713752).

The spelling of 211101612640 in words is "two hundred eleven billion, one hundred one million, six hundred twelve thousand, six hundred forty".