1797978025 has 12 divisors (see below), whose sum is σ = 2230515472. Its totient is φ = 1437722640.

The previous prime is 1797977983. The next prime is 1797978029. The reversal of 1797978025 is 5208797971.

It is not a de Polignac number, because 1797978025 - 2²⁵ = 1764423593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1797978029) 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 in 11 ways as a sum of consecutive naturals, for example, 43354 + ... + 73996.

Almost surely, 2^1797978025 is an apocalyptic number.

It is an amenable number.

1797978025 is a deficient number, since it is larger than the sum of its proper divisors (432537447).

1797978025 is a wasteful number, since it uses less digits than its factorization.

1797978025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33000 (or 32995 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 55.

The square root of 1797978025 is about 42402.5709715814. The cubic root of 1797978025 is about 1215.9847447391.

The spelling of 1797978025 in words is "one billion, seven hundred ninety-seven million, nine hundred seventy-eight thousand, twenty-five".