1551505560 has 96 divisors (see below), whose sum is σ = 5116169520. Its totient is φ = 376119040.

The previous prime is 1551505523. The next prime is 1551505567. The reversal of 1551505560 is 655051551.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551505567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38907 + ... + 67946.

Almost surely, 2^1551505560 is an apocalyptic number.

1551505560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551505560 is an abundant number, since it is smaller than the sum of its proper divisors (3564663960).

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

1551505560 is a wasteful number, since it uses less digits than its factorization.

1551505560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106889 (or 106874 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 1551505560 is about 39389.1553603273. The cubic root of 1551505560 is about 1157.6691105989.

The spelling of 1551505560 in words is "one billion, five hundred fifty-one million, five hundred five thousand, five hundred sixty".