1975665601 has 24 divisors (see below), whose sum is σ = 2456240640. Its totient is φ = 1555946496.

The previous prime is 1975665599. The next prime is 1975665623. The reversal of 1975665601 is 1065665791.

It is not a de Polignac number, because 1975665601 - 2¹ = 1975665599 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1975665691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260065 + ... + 267553.

It is an arithmetic number, because the mean of its divisors is an integer number (102343360).

Almost surely, 2^1975665601 is an apocalyptic number.

It is an amenable number.

1975665601 is a deficient number, since it is larger than the sum of its proper divisors (480575039).

1975665601 is a wasteful number, since it uses less digits than its factorization.

1975665601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7745 (or 7732 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 1975665601 is about 44448.4600520648. The cubic root of 1975665601 is about 1254.7902806656.

The spelling of 1975665601 in words is "one billion, nine hundred seventy-five million, six hundred sixty-five thousand, six hundred one".