49678100091 has 16 divisors (see below), whose sum is σ = 75163084800. Its totient is φ = 32414078664.

The previous prime is 49678100089. The next prime is 49678100099. The reversal of 49678100091 is 19000187694.

It is a happy number.

49678100091 is a `hidden beast` number, since 496 + 78 + 1 + 0 + 0 + 0 + 91 = 666.

It is not a de Polignac number, because 49678100091 - 2¹ = 49678100089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49678100099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19572451 + ... + 19574988.

It is an arithmetic number, because the mean of its divisors is an integer number (4697692800).

Almost surely, 2^49678100091 is an apocalyptic number.

49678100091 is a deficient number, since it is larger than the sum of its proper divisors (25484984709).

49678100091 is a wasteful number, since it uses less digits than its factorization.

49678100091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39147495 (or 39147489 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

It can be divided in two parts, 49678 and 100091, that added together give a square (149769 = 387²).

The spelling of 49678100091 in words is "forty-nine billion, six hundred seventy-eight million, one hundred thousand, ninety-one".