75720762505 has 4 divisors (see below), whose sum is σ = 90864915012. Its totient is φ = 60576610000.

The previous prime is 75720762473. The next prime is 75720762521. The reversal of 75720762505 is 50526702757.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40657076496 + 35063686009 = 201636^2 + 187253^2 .

It is not a de Polignac number, because 75720762505 - 2⁵ = 75720762473 is a prime.

It is a super-2 number, since 2×75720762505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 7572076246 + ... + 7572076255.

It is an arithmetic number, because the mean of its divisors is an integer number (22716228753).

Almost surely, 2^75720762505 is an apocalyptic number.

It is an amenable number.

75720762505 is a deficient number, since it is larger than the sum of its proper divisors (15144152507).

75720762505 is a wasteful number, since it uses less digits than its factorization.

75720762505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15144152506.

The product of its (nonzero) digits is 1029000, while the sum is 46.

The spelling of 75720762505 in words is "seventy-five billion, seven hundred twenty million, seven hundred sixty-two thousand, five hundred five".