213664399475 has 6 divisors (see below), whose sum is σ = 264943855380. Its totient is φ = 170931519560.

The previous prime is 213664399457. The next prime is 213664399517. The reversal of 213664399475 is 574993466312.

It is not a de Polignac number, because 213664399475 - 2²⁴ = 213647622259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4273287965 + ... + 4273288014.

It is an arithmetic number, because the mean of its divisors is an integer number (44157309230).

Almost surely, 2^213664399475 is an apocalyptic number.

213664399475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

213664399475 is a deficient number, since it is larger than the sum of its proper divisors (51279455905).

213664399475 is an equidigital number, since it uses as much as digits as its factorization.

213664399475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546575989 (or 8546575984 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 59.

The spelling of 213664399475 in words is "two hundred thirteen billion, six hundred sixty-four million, three hundred ninety-nine thousand, four hundred seventy-five".