49664104981 has 2 divisors, whose sum is σ = 49664104982. Its totient is φ = 49664104980.

The previous prime is 49664104951. The next prime is 49664105047. The reversal of 49664104981 is 18940146694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34459981956 + 15204123025 = 185634^2 + 123305^2 .

It is a cyclic number.

It is not a de Polignac number, because 49664104981 - 2⁵ = 49664104949 is a prime.

It is a super-2 number, since 2×49664104981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49664104951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24832052490 + 24832052491.

It is an arithmetic number, because the mean of its divisors is an integer number (24832052491).

Almost surely, 2^49664104981 is an apocalyptic number.

It is an amenable number.

49664104981 is a deficient number, since it is larger than the sum of its proper divisors (1).

49664104981 is an equidigital number, since it uses as much as digits as its factorization.

49664104981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 49664104981 in words is "forty-nine billion, six hundred sixty-four million, one hundred four thousand, nine hundred eighty-one".