15238620149 has 4 divisors (see below), whose sum is σ = 15301851180. Its totient is φ = 15175389120.

The previous prime is 15238620107. The next prime is 15238620151. The reversal of 15238620149 is 94102683251.

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 10023613924 + 5215006225 = 100118^2 + 72215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15238620149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15238620349) by changing a digit.

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, 31615154 + ... + 31615635.

It is an arithmetic number, because the mean of its divisors is an integer number (3825462795).

Almost surely, 2^15238620149 is an apocalyptic number.

It is an amenable number.

15238620149 is a deficient number, since it is larger than the sum of its proper divisors (63231031).

15238620149 is an equidigital number, since it uses as much as digits as its factorization.

15238620149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63231030.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 15238620149 in words is "fifteen billion, two hundred thirty-eight million, six hundred twenty thousand, one hundred forty-nine".