73870720251 has 4 divisors (see below), whose sum is σ = 98494293672. Its totient is φ = 49247146832.

The previous prime is 73870720247. The next prime is 73870720333. The reversal of 73870720251 is 15202707837.

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 73870720251 - 2² = 73870720247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73870728251) 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, 12311786706 + ... + 12311786711.

It is an arithmetic number, because the mean of its divisors is an integer number (24623573418).

Almost surely, 2^73870720251 is an apocalyptic number.

73870720251 is a deficient number, since it is larger than the sum of its proper divisors (24623573421).

73870720251 is a wasteful number, since it uses less digits than its factorization.

73870720251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24623573420.

The product of its (nonzero) digits is 164640, while the sum is 42.

The spelling of 73870720251 in words is "seventy-three billion, eight hundred seventy million, seven hundred twenty thousand, two hundred fifty-one".