1945257085 has 8 divisors (see below), whose sum is σ = 2435800320. Its totient is φ = 1488544464.

The previous prime is 1945257059. The next prime is 1945257101. The reversal of 1945257085 is 5807525491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945257085 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8457525 + ... + 8457754.

It is an arithmetic number, because the mean of its divisors is an integer number (304475040).

Almost surely, 2^1945257085 is an apocalyptic number.

It is an amenable number.

1945257085 is a deficient number, since it is larger than the sum of its proper divisors (490543235).

1945257085 is a wasteful number, since it uses less digits than its factorization.

1945257085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16915307.

The product of its (nonzero) digits is 504000, while the sum is 46.

The square root of 1945257085 is about 44105.0686996404. The cubic root of 1945257085 is about 1248.3192525500.

The spelling of 1945257085 in words is "one billion, nine hundred forty-five million, two hundred fifty-seven thousand, eighty-five".