260605538 has 4 divisors (see below), whose sum is σ = 390908310. Its totient is φ = 130302768.

The previous prime is 260605531. The next prime is 260605613. The reversal of 260605538 is 835506062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835506062 = 2 ⋅417753031.

It can be written as a sum of positive squares in only one way, i.e., 148181929 + 112423609 = 12173^2 + 10603^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 260605498 and 260605507.

It is not an unprimeable number, because it can be changed into a prime (260605531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65151383 + ... + 65151386.

Almost surely, 2^260605538 is an apocalyptic number.

260605538 is a deficient number, since it is larger than the sum of its proper divisors (130302772).

260605538 is a wasteful number, since it uses less digits than its factorization.

260605538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130302771.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 260605538 is about 16143.2815127532. The cubic root of 260605538 is about 638.7455391633.

The spelling of 260605538 in words is "two hundred sixty million, six hundred five thousand, five hundred thirty-eight".