211597953945 has 64 divisors (see below), whose sum is σ = 390578664960. Its totient is φ = 95817351168.

The previous prime is 211597953887. The next prime is 211597953949. The reversal of 211597953945 is 549359795112.

It is not a de Polignac number, because 211597953945 - 2⁸ = 211597953689 is a prime.

It is a super-2 number, since 2×211597953945² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211597953949) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24781717 + ... + 24790253.

It is an arithmetic number, because the mean of its divisors is an integer number (6102791640).

Almost surely, 2^211597953945 is an apocalyptic number.

It is an amenable number.

211597953945 is a deficient number, since it is larger than the sum of its proper divisors (178980711015).

211597953945 is a wasteful number, since it uses less digits than its factorization.

211597953945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10754.

The product of its digits is 15309000, while the sum is 60.

The spelling of 211597953945 in words is "two hundred eleven billion, five hundred ninety-seven million, nine hundred fifty-three thousand, nine hundred forty-five".