1551065490 has 128 divisors (see below), whose sum is σ = 4648250880. Its totient is φ = 365181696.

The previous prime is 1551065479. The next prime is 1551065491. The reversal of 1551065490 is 945601551.

1551065490 is a `hidden beast` number, since 1 + 5 + 5 + 106 + 549 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (1551065491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71124 + ... + 90336.

It is an arithmetic number, because the mean of its divisors is an integer number (36314460).

Almost surely, 2^1551065490 is an apocalyptic number.

1551065490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551065490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2324125440).

1551065490 is an abundant number, since it is smaller than the sum of its proper divisors (3097185390).

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

1551065490 is a wasteful number, since it uses less digits than its factorization.

1551065490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19265 (or 19259 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1551065490 is about 39383.5687819172. The cubic root of 1551065490 is about 1157.5596462538.

The spelling of 1551065490 in words is "one billion, five hundred fifty-one million, sixty-five thousand, four hundred ninety".