1551087660 has 24 divisors (see below), whose sum is σ = 4343045616. Its totient is φ = 413623360.

The previous prime is 1551087617. The next prime is 1551087673. The reversal of 1551087660 is 667801551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12925671 + ... + 12925790.

It is an arithmetic number, because the mean of its divisors is an integer number (180960234).

Almost surely, 2^1551087660 is an apocalyptic number.

1551087660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551087660 is an abundant number, since it is smaller than the sum of its proper divisors (2791957956).

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

1551087660 is a wasteful number, since it uses less digits than its factorization.

1551087660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25851473 (or 25851471 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 1551087660 is about 39383.8502434691. The cubic root of 1551087660 is about 1157.5651613820.

The spelling of 1551087660 in words is "one billion, five hundred fifty-one million, eighty-seven thousand, six hundred sixty".