15620441425 has 6 divisors (see below), whose sum is σ = 19369347398. Its totient is φ = 12496353120.

The previous prime is 15620441423. The next prime is 15620441521. The reversal of 15620441425 is 52414402651.

It can be written as a sum of positive squares in 3 ways, for example, as 265266369 + 15355175056 = 16287^2 + 123916^2 .

It is not a de Polignac number, because 15620441425 - 2¹ = 15620441423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15620441423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 312408804 + ... + 312408853.

Almost surely, 2^15620441425 is an apocalyptic number.

It is an amenable number.

15620441425 is a deficient number, since it is larger than the sum of its proper divisors (3748905973).

15620441425 is an equidigital number, since it uses as much as digits as its factorization.

15620441425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624817667 (or 624817662 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 15620441425 in words is "fifteen billion, six hundred twenty million, four hundred forty-one thousand, four hundred twenty-five".