15201661403 has 2 divisors, whose sum is σ = 15201661404. Its totient is φ = 15201661402.

The previous prime is 15201661373. The next prime is 15201661421. The reversal of 15201661403 is 30416610251.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15201661403 - 2⁶ = 15201661339 is a prime.

It is a super-2 number, since 2×15201661403² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15201661463) 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, 7600830701 + 7600830702.

It is an arithmetic number, because the mean of its divisors is an integer number (7600830702).

Almost surely, 2^15201661403 is an apocalyptic number.

15201661403 is a deficient number, since it is larger than the sum of its proper divisors (1).

15201661403 is an equidigital number, since it uses as much as digits as its factorization.

15201661403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 15201661403 in words is "fifteen billion, two hundred one million, six hundred sixty-one thousand, four hundred three".