72293510257 has 4 divisors (see below), whose sum is σ = 72726405696. Its totient is φ = 71860614820.

The previous prime is 72293510251. The next prime is 72293510273. The reversal of 72293510257 is 75201539227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72293510257 - 2³ = 72293510249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72293510251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216447469 + ... + 216447802.

It is an arithmetic number, because the mean of its divisors is an integer number (18181601424).

Almost surely, 2^72293510257 is an apocalyptic number.

It is an amenable number.

72293510257 is a deficient number, since it is larger than the sum of its proper divisors (432895439).

72293510257 is a wasteful number, since it uses less digits than its factorization.

72293510257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432895438.

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 72293510257 in words is "seventy-two billion, two hundred ninety-three million, five hundred ten thousand, two hundred fifty-seven".