1551989712 has 160 divisors (see below), whose sum is σ = 5049899008. Its totient is φ = 399748608.

The previous prime is 1551989701. The next prime is 1551989713. The reversal of 1551989712 is 2179891551.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551989713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183693 + ... + 191955.

Almost surely, 2^1551989712 is an apocalyptic number.

1551989712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551989712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2524949504).

1551989712 is an abundant number, since it is smaller than the sum of its proper divisors (3497909296).

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

1551989712 is a wasteful number, since it uses less digits than its factorization.

1551989712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8337 (or 8331 counting only the distinct ones).

The product of its digits is 226800, while the sum is 48.

The square root of 1551989712 is about 39395.3006334512. The cubic root of 1551989712 is about 1157.7895161240.

The spelling of 1551989712 in words is "one billion, five hundred fifty-one million, nine hundred eighty-nine thousand, seven hundred twelve".