1550020455 has 24 divisors (see below), whose sum is σ = 2786211792. Its totient is φ = 826676928.

The previous prime is 1550020421. The next prime is 1550020471. The reversal of 1550020455 is 5540200551.

It is not a de Polignac number, because 1550020455 - 2¹⁰ = 1550019431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 636654 + ... + 639083.

It is an arithmetic number, because the mean of its divisors is an integer number (116092158).

Almost surely, 2^1550020455 is an apocalyptic number.

1550020455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1550020455 is a deficient number, since it is larger than the sum of its proper divisors (1236191337).

1550020455 is an equidigital number, since it uses as much as digits as its factorization.

1550020455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275757 (or 1275745 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 1550020455 is about 39370.2991479618. The cubic root of 1550020455 is about 1157.2996180921.

The spelling of 1550020455 in words is "one billion, five hundred fifty million, twenty thousand, four hundred fifty-five".