49491797647 has 8 divisors (see below), whose sum is σ = 51680563200. Its totient is φ = 47306111160.

The previous prime is 49491797639. The next prime is 49491797653. The reversal of 49491797647 is 74679719494.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49491797647 - 2³ = 49491797639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49491797617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736879 + ... + 801232.

It is an arithmetic number, because the mean of its divisors is an integer number (6460070400).

Almost surely, 2^49491797647 is an apocalyptic number.

49491797647 is a deficient number, since it is larger than the sum of its proper divisors (2188765553).

49491797647 is a wasteful number, since it uses less digits than its factorization.

49491797647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539533.

The product of its digits is 96018048, while the sum is 67.

The spelling of 49491797647 in words is "forty-nine billion, four hundred ninety-one million, seven hundred ninety-seven thousand, six hundred forty-seven".