15138071477 has 2 divisors, whose sum is σ = 15138071478. Its totient is φ = 15138071476.

The previous prime is 15138071461. The next prime is 15138071503. The reversal of 15138071477 is 77417083151.

15138071477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12321222001 + 2816849476 = 111001^2 + 53074^2 .

It is a cyclic number.

It is not a de Polignac number, because 15138071477 - 2⁴ = 15138071461 is a prime.

It is a super-2 number, since 2×15138071477² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15138070477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7569035738 + 7569035739.

It is an arithmetic number, because the mean of its divisors is an integer number (7569035739).

Almost surely, 2^15138071477 is an apocalyptic number.

It is an amenable number.

15138071477 is a deficient number, since it is larger than the sum of its proper divisors (1).

15138071477 is an equidigital number, since it uses as much as digits as its factorization.

15138071477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164640, while the sum is 44.

The spelling of 15138071477 in words is "fifteen billion, one hundred thirty-eight million, seventy-one thousand, four hundred seventy-seven".