49781951949 has 8 divisors (see below), whose sum is σ = 67788190080. Its totient is φ = 32481840896.

The previous prime is 49781951897. The next prime is 49781951969. The reversal of 49781951949 is 94915918794.

It is a happy number.

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 49781951949 - 2⁹ = 49781951437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49781951949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49781951969) 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, 176531604 + ... + 176531885.

It is an arithmetic number, because the mean of its divisors is an integer number (8473523760).

Almost surely, 2^49781951949 is an apocalyptic number.

It is an amenable number.

49781951949 is a deficient number, since it is larger than the sum of its proper divisors (18006238131).

49781951949 is a wasteful number, since it uses less digits than its factorization.

49781951949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353063539.

The product of its digits is 29393280, while the sum is 66.

The spelling of 49781951949 in words is "forty-nine billion, seven hundred eighty-one million, nine hundred fifty-one thousand, nine hundred forty-nine".