7511998464 has 138 divisors (see below), whose sum is σ = 21810378200. Its totient is φ = 2491416576.

The previous prime is 7511998457. The next prime is 7511998493. The reversal of 7511998464 is 4648991157.

It is a self number, because there is not a number n which added to its sum of digits gives 7511998464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37748637 + ... + 37748835.

Almost surely, 2^7511998464 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 7511998464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10905189100).

7511998464 is an abundant number, since it is smaller than the sum of its proper divisors (14298379736).

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

7511998464 is an frugal number, since it uses more digits than its factorization.

7511998464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 204 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 7511998464 is about 86671.7858590672. The cubic root of 7511998464 is about 1958.4770955168.

The spelling of 7511998464 in words is "seven billion, five hundred eleven million, nine hundred ninety-eight thousand, four hundred sixty-four".