1554455664 has 160 divisors (see below), whose sum is σ = 4722912000. Its totient is φ = 488146176.

The previous prime is 1554455663. The next prime is 1554455671. The reversal of 1554455664 is 4665544551.

1554455664 is a `hidden beast` number, since 1 + 55 + 44 + 556 + 6 + 4 = 666.

It is a super-2 number, since 2×1554455664² = 4832664822683361792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554455663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1879219 + ... + 1880045.

It is an arithmetic number, because the mean of its divisors is an integer number (29518200).

Almost surely, 2^1554455664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1554455664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2361456000).

1554455664 is an abundant number, since it is smaller than the sum of its proper divisors (3168456336).

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

1554455664 is a wasteful number, since it uses less digits than its factorization.

1554455664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1080 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 45.

The square root of 1554455664 is about 39426.5857512415. The cubic root of 1554455664 is about 1158.4023944516.

The spelling of 1554455664 in words is "one billion, five hundred fifty-four million, four hundred fifty-five thousand, six hundred sixty-four".