1965356541 has 12 divisors (see below), whose sum is σ = 2943991232. Its totient is φ = 1310237532.

The previous prime is 1965356537. The next prime is 1965356543. The reversal of 1965356541 is 1456535691.

1965356541 is a `hidden beast` number, since 1 + 9 + 6 + 53 + 56 + 541 = 666.

It is not a de Polignac number, because 1965356541 - 2² = 1965356537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965356543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4043701 + ... + 4044186.

Almost surely, 2^1965356541 is an apocalyptic number.

It is an amenable number.

1965356541 is a deficient number, since it is larger than the sum of its proper divisors (978634691).

1965356541 is an frugal number, since it uses more digits than its factorization.

1965356541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087902 (or 8087890 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 1965356541 is about 44332.3419300176. The cubic root of 1965356541 is about 1252.6039671307.

The spelling of 1965356541 in words is "one billion, nine hundred sixty-five million, three hundred fifty-six thousand, five hundred forty-one".