1406641554 has 72 divisors (see below), whose sum is σ = 3320808192. Its totient is φ = 429811920.

The previous prime is 1406641553. The next prime is 1406641583. The reversal of 1406641554 is 4551466041.

1406641554 is a `hidden beast` number, since 1 + 4 + 0 + 6 + 641 + 5 + 5 + 4 = 666.

It is a super-2 number, since 2×1406641554² = 3957280922879069832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406641553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 197947 + ... + 204929.

It is an arithmetic number, because the mean of its divisors is an integer number (46122336).

Almost surely, 2^1406641554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1406641554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1660404096).

1406641554 is an abundant number, since it is smaller than the sum of its proper divisors (1914166638).

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

1406641554 is a wasteful number, since it uses less digits than its factorization.

1406641554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7060 (or 7038 counting only the distinct ones).

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

The square root of 1406641554 is about 37505.2203566384. The cubic root of 1406641554 is about 1120.4551599205.

The spelling of 1406641554 in words is "one billion, four hundred six million, six hundred forty-one thousand, five hundred fifty-four".