213890661054 has 24 divisors (see below), whose sum is σ = 529634018160. Its totient is φ = 61111617408.

The previous prime is 213890661053. The next prime is 213890661067. The reversal of 213890661054 is 450166098312.

213890661054 is a `hidden beast` number, since 21 + 3 + 8 + 9 + 0 + 6 + 610 + 5 + 4 = 666.

It is a super-2 number, since 2×213890661054² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213890661053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 848772339 + ... + 848772590.

It is an arithmetic number, because the mean of its divisors is an integer number (22068084090).

Almost surely, 2^213890661054 is an apocalyptic number.

213890661054 is an abundant number, since it is smaller than the sum of its proper divisors (315743357106).

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

213890661054 is a wasteful number, since it uses less digits than its factorization.

213890661054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697544944 (or 1697544941 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 213890661054 in words is "two hundred thirteen billion, eight hundred ninety million, six hundred sixty-one thousand, fifty-four".