1615625441 has 2 divisors, whose sum is σ = 1615625442. Its totient is φ = 1615625440.

The previous prime is 1615625393. The next prime is 1615625483. The reversal of 1615625441 is 1445265161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1536326416 + 79299025 = 39196^2 + 8905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1615625441 is a prime.

It is a super-2 number, since 2×1615625441² = 5220491131212888962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1615622441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807812720 + 807812721.

It is an arithmetic number, because the mean of its divisors is an integer number (807812721).

Almost surely, 2^1615625441 is an apocalyptic number.

It is an amenable number.

1615625441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615625441 is an equidigital number, since it uses as much as digits as its factorization.

1615625441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 1615625441 is about 40194.8434628125. The cubic root of 1615625441 is about 1173.4021900143.

The spelling of 1615625441 in words is "one billion, six hundred fifteen million, six hundred twenty-five thousand, four hundred forty-one".