212985770490 has 64 divisors (see below), whose sum is σ = 581814817920. Its totient is φ = 55410929280.

The previous prime is 212985770489. The next prime is 212985770509. The reversal of 212985770490 is 94077589212.

212985770490 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 85 + 7 + 70 + 490 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9608884 + ... + 9631023.

It is an arithmetic number, because the mean of its divisors is an integer number (9090856530).

Almost surely, 2^212985770490 is an apocalyptic number.

212985770490 is an abundant number, since it is smaller than the sum of its proper divisors (368829047430).

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

212985770490 is a wasteful number, since it uses less digits than its factorization.

212985770490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19239964 (or 19239958 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 212985770490 in words is "two hundred twelve billion, nine hundred eighty-five million, seven hundred seventy thousand, four hundred ninety".