61479398401 has 2 divisors, whose sum is σ = 61479398402. Its totient is φ = 61479398400.

The previous prime is 61479398399. The next prime is 61479398423. The reversal of 61479398401 is 10489397416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49707148401 + 11772250000 = 222951^2 + 108500^2 .

It is a cyclic number.

It is not a de Polignac number, because 61479398401 - 2¹ = 61479398399 is a prime.

Together with 61479398399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61479398501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30739699200 + 30739699201.

It is an arithmetic number, because the mean of its divisors is an integer number (30739699201).

Almost surely, 2^61479398401 is an apocalyptic number.

It is an amenable number.

61479398401 is a deficient number, since it is larger than the sum of its proper divisors (1).

61479398401 is an equidigital number, since it uses as much as digits as its factorization.

61479398401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 61479398401 in words is "sixty-one billion, four hundred seventy-nine million, three hundred ninety-eight thousand, four hundred one".