206261401554 has 72 divisors (see below), whose sum is σ = 484772560272. Its totient is φ = 63353365920.

The previous prime is 206261401553. The next prime is 206261401589. The reversal of 206261401554 is 455104162602.

206261401554 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 61 + 40 + 1 + 554 = 666.

It is a super-2 number, since 2×206261401554² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206261401553) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1677609 + ... + 1796355.

It is an arithmetic number, because the mean of its divisors is an integer number (6732952226).

Almost surely, 2^206261401554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206261401554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242386280136).

206261401554 is an abundant number, since it is smaller than the sum of its proper divisors (278511158718).

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

206261401554 is a wasteful number, since it uses less digits than its factorization.

206261401554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119352 (or 119336 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 206261401554 in words is "two hundred six billion, two hundred sixty-one million, four hundred one thousand, five hundred fifty-four".