307612720138 has 8 divisors (see below), whose sum is σ = 461421997380. Its totient is φ = 153805387680.

The previous prime is 307612720099. The next prime is 307612720141. The reversal of 307612720138 is 831027216703.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 283676607769 + 23936112369 = 532613^2 + 154713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 307612720138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10878 + ... + 784438.

Almost surely, 2^307612720138 is an apocalyptic number.

307612720138 is a deficient number, since it is larger than the sum of its proper divisors (153809277242).

307612720138 is a wasteful number, since it uses less digits than its factorization.

307612720138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972392.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 307612720138 in words is "three hundred seven billion, six hundred twelve million, seven hundred twenty thousand, one hundred thirty-eight".