213178857456 has 40 divisors (see below), whose sum is σ = 550909711744. Its totient is φ = 71034114240.

The previous prime is 213178857439. The next prime is 213178857461. The reversal of 213178857456 is 654758871312.

It is a junction number, because it is equal to n+sod(n) for n = 213178857396 and 213178857405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661666 + ... + 929601.

Almost surely, 2^213178857456 is an apocalyptic number.

It is an amenable number.

213178857456 is an abundant number, since it is smaller than the sum of its proper divisors (337730854288).

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

213178857456 is a wasteful number, since it uses less digits than its factorization.

213178857456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594069 (or 1594063 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 57.

The spelling of 213178857456 in words is "two hundred thirteen billion, one hundred seventy-eight million, eight hundred fifty-seven thousand, four hundred fifty-six".