49691953961021 has 8 divisors (see below), whose sum is σ = 49732513826904. Its totient is φ = 49651396674880.

The previous prime is 49691953961011. The next prime is 49691953961057. The reversal of 49691953961021 is 12016935919694.

It can be written as a sum of positive squares in 4 ways, for example, as 2096373868996 + 47595580092025 = 1447886^2 + 6898955^2 .

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 49691953961021 - 2¹⁴ = 49691953944637 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 (49691953961011) 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, 38882831 + ... + 40140483.

It is an arithmetic number, because the mean of its divisors is an integer number (6216564228363).

Almost surely, 2^{49691953961021} is an apocalyptic number.

It is an amenable number.

49691953961021 is a deficient number, since it is larger than the sum of its proper divisors (40559865883).

49691953961021 is a wasteful number, since it uses less digits than its factorization.

49691953961021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289871.

The product of its (nonzero) digits is 28343520, while the sum is 65.

The spelling of 49691953961021 in words is "forty-nine trillion, six hundred ninety-one billion, nine hundred fifty-three million, nine hundred sixty-one thousand, twenty-one".