15400000073 has 2 divisors, whose sum is σ = 15400000074. Its totient is φ = 15400000072.

The previous prime is 15399999997. The next prime is 15400000111. The reversal of 15400000073 is 37000000451.

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., 14430736384 + 969263689 = 120128^2 + 31133^2 .

It is an emirp because it is prime and its reverse (37000000451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15400000073 - 2²⁰ = 15398951497 is a prime.

It is not a weakly prime, because it can be changed into another prime (15400000373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7700000036 + 7700000037.

It is an arithmetic number, because the mean of its divisors is an integer number (7700000037).

Almost surely, 2^15400000073 is an apocalyptic number.

It is an amenable number.

15400000073 is a deficient number, since it is larger than the sum of its proper divisors (1).

15400000073 is an equidigital number, since it uses as much as digits as its factorization.

15400000073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The spelling of 15400000073 in words is "fifteen billion, four hundred million, seventy-three", and thus it is an aban number.