15425747761 has 2 divisors, whose sum is σ = 15425747762. Its totient is φ = 15425747760.

The previous prime is 15425747731. The next prime is 15425747767. The reversal of 15425747761 is 16774752451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13743107361 + 1682640400 = 117231^2 + 41020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15425747761 is a prime.

It is not a weakly prime, because it can be changed into another prime (15425747767) 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, 7712873880 + 7712873881.

It is an arithmetic number, because the mean of its divisors is an integer number (7712873881).

Almost surely, 2^15425747761 is an apocalyptic number.

It is an amenable number.

15425747761 is a deficient number, since it is larger than the sum of its proper divisors (1).

15425747761 is an equidigital number, since it uses as much as digits as its factorization.

15425747761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1646400, while the sum is 49.

The spelling of 15425747761 in words is "fifteen billion, four hundred twenty-five million, seven hundred forty-seven thousand, seven hundred sixty-one".