261676006770403 has 4 divisors (see below), whose sum is σ = 263031841002568. Its totient is φ = 260320172538240.

The previous prime is 261676006770389. The next prime is 261676006770419. The reversal of 261676006770403 is 304077600676162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261676006770403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261676006770443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677917115793 + ... + 677917116178.

It is an arithmetic number, because the mean of its divisors is an integer number (65757960250642).

Almost surely, 2^{261676006770403} is an apocalyptic number.

261676006770403 is a deficient number, since it is larger than the sum of its proper divisors (1355834232165).

261676006770403 is a wasteful number, since it uses less digits than its factorization.

261676006770403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355834232164.

The product of its (nonzero) digits is 10668672, while the sum is 55.

The spelling of 261676006770403 in words is "two hundred sixty-one trillion, six hundred seventy-six billion, six million, seven hundred seventy thousand, four hundred three".