15379925881 has 2 divisors, whose sum is σ = 15379925882. Its totient is φ = 15379925880.

The previous prime is 15379925807. The next prime is 15379925903. The reversal of 15379925881 is 18852997351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10339635856 + 5040290025 = 101684^2 + 70995^2 .

It is a cyclic number.

It is not a de Polignac number, because 15379925881 - 2¹¹ = 15379923833 is a prime.

It is a super-2 number, since 2×15379925881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15379925581) 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 as a sum of consecutive naturals, namely, 7689962940 + 7689962941.

It is an arithmetic number, because the mean of its divisors is an integer number (7689962941).

Almost surely, 2^15379925881 is an apocalyptic number.

It is an amenable number.

15379925881 is a deficient number, since it is larger than the sum of its proper divisors (1).

15379925881 is an equidigital number, since it uses as much as digits as its factorization.

15379925881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 58.

The spelling of 15379925881 in words is "fifteen billion, three hundred seventy-nine million, nine hundred twenty-five thousand, eight hundred eighty-one".