49811379681 has 48 divisors (see below), whose sum is σ = 77923238976. Its totient is φ = 28219290624.

The previous prime is 49811379679. The next prime is 49811379689. The reversal of 49811379681 is 18697311894.

It is not a de Polignac number, because 49811379681 - 2¹ = 49811379679 is a prime.

It is a super-2 number, since 2×49811379681² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49811379689) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26119330 + ... + 26121236.

It is an arithmetic number, because the mean of its divisors is an integer number (1623400812).

Almost surely, 2^49811379681 is an apocalyptic number.

It is an amenable number.

49811379681 is a deficient number, since it is larger than the sum of its proper divisors (28111859295).

49811379681 is a wasteful number, since it uses less digits than its factorization.

49811379681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358 (or 3351 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 57.

The spelling of 49811379681 in words is "forty-nine billion, eight hundred eleven million, three hundred seventy-nine thousand, six hundred eighty-one".