211642107620 has 12 divisors (see below), whose sum is σ = 444448426044. Its totient is φ = 84656843040.

The previous prime is 211642107587. The next prime is 211642107623. The reversal of 211642107620 is 26701246112.

It can be written as a sum of positive squares in 2 ways, for example, as 154337408164 + 57304699456 = 392858^2 + 239384^2 .

It is not an unprimeable number, because it can be changed into a prime (211642107623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5291052671 + ... + 5291052710.

It is an arithmetic number, because the mean of its divisors is an integer number (37037368837).

Almost surely, 2^211642107620 is an apocalyptic number.

211642107620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211642107620 is an abundant number, since it is smaller than the sum of its proper divisors (232806318424).

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

211642107620 is a wasteful number, since it uses less digits than its factorization.

211642107620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10582105390 (or 10582105388 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 211642107620 in words is "two hundred eleven billion, six hundred forty-two million, one hundred seven thousand, six hundred twenty".