61263081873891 has 6 divisors (see below), whose sum is σ = 88491118262300. Its totient is φ = 40842054582588.

The previous prime is 61263081873887. The next prime is 61263081873949. The reversal of 61263081873891 is 19837818036216.

61263081873891 is a `hidden beast` number, since 6 + 12 + 63 + 0 + 8 + 187 + 389 + 1 = 666.

It is not a de Polignac number, because 61263081873891 - 2² = 61263081873887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61263081873391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3403504548541 + ... + 3403504548558.

Almost surely, 2^{61263081873891} is an apocalyptic number.

61263081873891 is a deficient number, since it is larger than the sum of its proper divisors (27228036388409).

61263081873891 is a wasteful number, since it uses less digits than its factorization.

61263081873891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6807009097105 (or 6807009097102 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 61263081873891 in words is "sixty-one trillion, two hundred sixty-three billion, eighty-one million, eight hundred seventy-three thousand, eight hundred ninety-one".