1551120664 has 32 divisors (see below), whose sum is σ = 3081607200. Its totient is φ = 729423360.

The previous prime is 1551120661. The next prime is 1551120677. The reversal of 1551120664 is 4660211551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551120661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245902 + ... + 252130.

It is an arithmetic number, because the mean of its divisors is an integer number (96300225).

Almost surely, 2^1551120664 is an apocalyptic number.

It is an amenable number.

1551120664 is a deficient number, since it is larger than the sum of its proper divisors (1530486536).

1551120664 is a wasteful number, since it uses less digits than its factorization.

1551120664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8083 (or 8079 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1551120664 is about 39384.2692454741. The cubic root of 1551120664 is about 1157.5733715368.

The spelling of 1551120664 in words is "one billion, five hundred fifty-one million, one hundred twenty thousand, six hundred sixty-four".