7251620744 has 16 divisors (see below), whose sum is σ = 13618835100. Its totient is φ = 3619931392.

The previous prime is 7251620737. The next prime is 7251620809. The reversal of 7251620744 is 4470261527.

It can be written as a sum of positive squares in 2 ways, for example, as 7100084644 + 151536100 = 84262^2 + 12310^2 .

It is a super-2 number, since 2×7251620744² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7251620698 and 7251620707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729629 + ... + 739500.

Almost surely, 2^7251620744 is an apocalyptic number.

It is an amenable number.

7251620744 is a deficient number, since it is larger than the sum of its proper divisors (6367214356).

7251620744 is a wasteful number, since it uses less digits than its factorization.

7251620744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469752 (or 1469748 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 7251620744 is about 85156.4486342637. The cubic root of 7251620744 is about 1935.5825325587.

The spelling of 7251620744 in words is "seven billion, two hundred fifty-one million, six hundred twenty thousand, seven hundred forty-four".