1551040000 has 200 divisors, whose sum is σ = 4007598408. Its totient is φ = 599040000.

The previous prime is 1551039961. The next prime is 1551040013. The reversal of 1551040000 is 401551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11839935 + ... + 11840065.

Almost surely, 2^1551040000 is an apocalyptic number.

1551040000 is a gapful number since it is divisible by the number (10) 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 1551040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2003799204).

1551040000 is an abundant number, since it is smaller than the sum of its proper divisors (2456558408).

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

1551040000 is an frugal number, since it uses more digits than its factorization.

1551040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1551040000 is about 39383.2451684723. The cubic root of 1551040000 is about 1157.5533051596.

Adding to 1551040000 its reverse (401551), we get a palindrome (1551441551).

The spelling of 1551040000 in words is "one billion, five hundred fifty-one million, forty thousand".