201556410 has 64 divisors (see below), whose sum is σ = 540618624. Its totient is φ = 47667200.

The previous prime is 201556393. The next prime is 201556423. The reversal of 201556410 is 14655102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6082 + ... + 20978.

It is an arithmetic number, because the mean of its divisors is an integer number (8447166).

Almost surely, 2^201556410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201556410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270309312).

201556410 is an abundant number, since it is smaller than the sum of its proper divisors (339062214).

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

201556410 is a wasteful number, since it uses less digits than its factorization.

201556410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14959.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 201556410 is about 14197.0563850398. The cubic root of 201556410 is about 586.3166196192.

It can be divided in two parts, 20155 and 6410, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 201556410 in words is "two hundred one million, five hundred fifty-six thousand, four hundred ten".