49212921677 has 2 divisors, whose sum is σ = 49212921678. Its totient is φ = 49212921676.

The previous prime is 49212921599. The next prime is 49212921689. The reversal of 49212921677 is 77612921294.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41866888996 + 7346032681 = 204614^2 + 85709^2 .

It is a cyclic number.

It is not a de Polignac number, because 49212921677 - 2¹⁴ = 49212905293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49212921697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24606460838 + 24606460839.

It is an arithmetic number, because the mean of its divisors is an integer number (24606460839).

Almost surely, 2^49212921677 is an apocalyptic number.

It is an amenable number.

49212921677 is a deficient number, since it is larger than the sum of its proper divisors (1).

49212921677 is an equidigital number, since it uses as much as digits as its factorization.

49212921677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The spelling of 49212921677 in words is "forty-nine billion, two hundred twelve million, nine hundred twenty-one thousand, six hundred seventy-seven".