1554638401 has 8 divisors (see below), whose sum is σ = 1565881704. Its totient is φ = 1543436160.

The previous prime is 1554638399. The next prime is 1554638419. The reversal of 1554638401 is 1048364551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 89586225 + 1465052176 = 9465^2 + 38276^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1554638401 - 2¹ = 1554638399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1554638461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67851 + ... + 87823.

It is an arithmetic number, because the mean of its divisors is an integer number (195735213).

Almost surely, 2^1554638401 is an apocalyptic number.

It is an amenable number.

1554638401 is a deficient number, since it is larger than the sum of its proper divisors (11243303).

1554638401 is a wasteful number, since it uses less digits than its factorization.

1554638401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20531.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 1554638401 is about 39428.9031168761. The cubic root of 1554638401 is about 1158.4477854072.

The spelling of 1554638401 in words is "one billion, five hundred fifty-four million, six hundred thirty-eight thousand, four hundred one".