212578398793 has 16 divisors (see below), whose sum is σ = 220563578880. Its totient is φ = 204664496400.

The previous prime is 212578398761. The next prime is 212578398797. The reversal of 212578398793 is 397893875212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212578398793 - 2⁵ = 212578398761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212578398797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22280418 + ... + 22289956.

It is an arithmetic number, because the mean of its divisors is an integer number (13785223680).

Almost surely, 2^212578398793 is an apocalyptic number.

It is an amenable number.

212578398793 is a deficient number, since it is larger than the sum of its proper divisors (7985180087).

212578398793 is a wasteful number, since it uses less digits than its factorization.

212578398793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13188.

The product of its digits is 45722880, while the sum is 64.

The spelling of 212578398793 in words is "two hundred twelve billion, five hundred seventy-eight million, three hundred ninety-eight thousand, seven hundred ninety-three".