49517157761 has 2 divisors, whose sum is σ = 49517157762. Its totient is φ = 49517157760.

The previous prime is 49517157749. The next prime is 49517157791. The reversal of 49517157761 is 16775171594.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44050034161 + 5467123600 = 209881^2 + 73940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49517157761 is a prime.

It is not a weakly prime, because it can be changed into another prime (49517157721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24758578880 + 24758578881.

It is an arithmetic number, because the mean of its divisors is an integer number (24758578881).

Almost surely, 2^49517157761 is an apocalyptic number.

It is an amenable number.

49517157761 is a deficient number, since it is larger than the sum of its proper divisors (1).

49517157761 is an equidigital number, since it uses as much as digits as its factorization.

49517157761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1852200, while the sum is 53.

The spelling of 49517157761 in words is "forty-nine billion, five hundred seventeen million, one hundred fifty-seven thousand, seven hundred sixty-one".