49897771623 has 12 divisors (see below), whose sum is σ = 82370924688. Its totient is φ = 28513012320.

The previous prime is 49897771619. The next prime is 49897771639. The reversal of 49897771623 is 32617779894.

49897771623 is a `hidden beast` number, since 498 + 9 + 77 + 71 + 6 + 2 + 3 = 666.

It is not a de Polignac number, because 49897771623 - 2² = 49897771619 is a prime.

It is a super-2 number, since 2×49897771623² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 792028121 = 49897771623 / (4 + 9 + 8 + 9 + 7 + 7 + 7 + 1 + 6 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49897731623) 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 11 ways as a sum of consecutive naturals, for example, 396013998 + ... + 396014123.

It is an arithmetic number, because the mean of its divisors is an integer number (6864243724).

Almost surely, 2^49897771623 is an apocalyptic number.

49897771623 is a deficient number, since it is larger than the sum of its proper divisors (32473153065).

49897771623 is a wasteful number, since it uses less digits than its factorization.

49897771623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792028134 (or 792028131 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 49897771623 in words is "forty-nine billion, eight hundred ninety-seven million, seven hundred seventy-one thousand, six hundred twenty-three".