212315353778 has 16 divisors (see below), whose sum is σ = 347437264896. Its totient is φ = 96503606640.

The previous prime is 212315353673. The next prime is 212315353823. The reversal of 212315353778 is 877353513212.

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, 541775 + ... + 847437.

It is an arithmetic number, because the mean of its divisors is an integer number (21714829056).

Almost surely, 2^212315353778 is an apocalyptic number.

212315353778 is a deficient number, since it is larger than the sum of its proper divisors (135121911118).

212315353778 is a wasteful number, since it uses less digits than its factorization.

212315353778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337249.

The product of its digits is 1058400, while the sum is 47.

The spelling of 212315353778 in words is "two hundred twelve billion, three hundred fifteen million, three hundred fifty-three thousand, seven hundred seventy-eight".