49897746381 has 32 divisors (see below), whose sum is σ = 76423737600. Its totient is φ = 28367285760.

The previous prime is 49897746377. The next prime is 49897746403. The reversal of 49897746381 is 18364779894.

It is not a de Polignac number, because 49897746381 - 2² = 49897746377 is a prime.

It is a super-2 number, since 2×49897746381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49897746181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8273275 + ... + 8279303.

It is an arithmetic number, because the mean of its divisors is an integer number (2388241800).

Almost surely, 2^49897746381 is an apocalyptic number.

It is an amenable number.

49897746381 is a deficient number, since it is larger than the sum of its proper divisors (26525991219).

49897746381 is a wasteful number, since it uses less digits than its factorization.

49897746381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989.

The product of its digits is 73156608, while the sum is 66.

The spelling of 49897746381 in words is "forty-nine billion, eight hundred ninety-seven million, seven hundred forty-six thousand, three hundred eighty-one".