1554557140 has 12 divisors (see below), whose sum is σ = 3264570036. Its totient is φ = 621822848.

The previous prime is 1554557131. The next prime is 1554557153. The reversal of 1554557140 is 417554551.

It can be written as a sum of positive squares in 2 ways, for example, as 280495504 + 1274061636 = 16748^2 + 35694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1554557140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38863909 + ... + 38863948.

It is an arithmetic number, because the mean of its divisors is an integer number (272047503).

Almost surely, 2^1554557140 is an apocalyptic number.

1554557140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1554557140 is an abundant number, since it is smaller than the sum of its proper divisors (1710012896).

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

1554557140 is a wasteful number, since it uses less digits than its factorization.

1554557140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77727866 (or 77727864 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 1554557140 is about 39427.8726283831. The cubic root of 1554557140 is about 1158.4276010210.

The spelling of 1554557140 in words is "one billion, five hundred fifty-four million, five hundred fifty-seven thousand, one hundred forty".