1551416768 has 56 divisors (see below), whose sum is σ = 3363041280. Its totient is φ = 704229120.

The previous prime is 1551416767. The next prime is 1551416777. The reversal of 1551416768 is 8676141551.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551416767) 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, 899555 + ... + 901277.

Almost surely, 2^1551416768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551416768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681520640).

1551416768 is an abundant number, since it is smaller than the sum of its proper divisors (1811624512).

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

1551416768 is a wasteful number, since it uses less digits than its factorization.

1551416768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025 (or 3015 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The square root of 1551416768 is about 39388.0282319387. The cubic root of 1551416768 is about 1157.6470258749.

The spelling of 1551416768 in words is "one billion, five hundred fifty-one million, four hundred sixteen thousand, seven hundred sixty-eight".