1551164988 has 48 divisors (see below), whose sum is σ = 3840802560. Its totient is φ = 486186624.

The previous prime is 1551164987. The next prime is 1551164999. The reversal of 1551164988 is 8894611551.

It is a super-2 number, since 2×1551164988² = 4812225639994080288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551164987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31345 + ... + 63912.

It is an arithmetic number, because the mean of its divisors is an integer number (80016720).

Almost surely, 2^1551164988 is an apocalyptic number.

It is an amenable number.

1551164988 is an abundant number, since it is smaller than the sum of its proper divisors (2289637572).

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

1551164988 is a wasteful number, since it uses less digits than its factorization.

1551164988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95346 (or 95344 counting only the distinct ones).

The product of its digits is 345600, while the sum is 48.

The square root of 1551164988 is about 39384.8319534310. The cubic root of 1551164988 is about 1157.5843974990.

The spelling of 1551164988 in words is "one billion, five hundred fifty-one million, one hundred sixty-four thousand, nine hundred eighty-eight".