7492720751 has 4 divisors (see below), whose sum is σ = 7604552472. Its totient is φ = 7380889032.

The previous prime is 7492720747. The next prime is 7492720759. The reversal of 7492720751 is 1570272947.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7492720751 - 2² = 7492720747 is a prime.

It is a super-2 number, since 2×7492720751² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7492720759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55915760 + ... + 55915893.

It is an arithmetic number, because the mean of its divisors is an integer number (1901138118).

Almost surely, 2^7492720751 is an apocalyptic number.

7492720751 is a deficient number, since it is larger than the sum of its proper divisors (111831721).

7492720751 is a wasteful number, since it uses less digits than its factorization.

7492720751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111831720.

The product of its (nonzero) digits is 246960, while the sum is 44.

The square root of 7492720751 is about 86560.5034123531. The cubic root of 7492720751 is about 1956.8003423435.

The spelling of 7492720751 in words is "seven billion, four hundred ninety-two million, seven hundred twenty thousand, seven hundred fifty-one".