1554550440 has 32 divisors (see below), whose sum is σ = 4663651680. Its totient is φ = 414546752.

The previous prime is 1554550429. The next prime is 1554550447. The reversal of 1554550440 is 440554551.

It is not an unprimeable number, because it can be changed into a prime (1554550447) 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, 6477174 + ... + 6477413.

It is an arithmetic number, because the mean of its divisors is an integer number (145739115).

Almost surely, 2^1554550440 is an apocalyptic number.

1554550440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1554550440 is an abundant number, since it is smaller than the sum of its proper divisors (3109101240).

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

1554550440 is a wasteful number, since it uses less digits than its factorization.

1554550440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12954601 (or 12954597 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

The square root of 1554550440 is about 39427.7876630176. The cubic root of 1554550440 is about 1158.4259367794.

The spelling of 1554550440 in words is "one billion, five hundred fifty-four million, five hundred fifty thousand, four hundred forty".