1555000450 has 24 divisors (see below), whose sum is σ = 2928919680. Its totient is φ = 614125200.

The previous prime is 1555000441. The next prime is 1555000487. The reversal of 1555000450 is 540005551.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192886 + ... + 200785.

It is an arithmetic number, because the mean of its divisors is an integer number (122038320).

Almost surely, 2^1555000450 is an apocalyptic number.

1555000450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1555000450 is a deficient number, since it is larger than the sum of its proper divisors (1373919230).

1555000450 is a wasteful number, since it uses less digits than its factorization.

1555000450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393762 (or 393757 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 1555000450 is about 39433.4940120705. The cubic root of 1555000450 is about 1158.5377060618.

The spelling of 1555000450 in words is "one billion, five hundred fifty-five million, four hundred fifty", and thus it is an aban number.