61408804969 has 2 divisors, whose sum is σ = 61408804970. Its totient is φ = 61408804968.

The previous prime is 61408804967. The next prime is 61408804979. The reversal of 61408804969 is 96940880416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59545760400 + 1863044569 = 244020^2 + 43163^2 .

It is a cyclic number.

It is not a de Polignac number, because 61408804969 - 2¹ = 61408804967 is a prime.

It is a super-2 number, since 2×61408804969² (a number of 22 digits) contains 22 as substring.

Together with 61408804967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61408804967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30704402484 + 30704402485.

It is an arithmetic number, because the mean of its divisors is an integer number (30704402485).

Almost surely, 2^61408804969 is an apocalyptic number.

It is an amenable number.

61408804969 is a deficient number, since it is larger than the sum of its proper divisors (1).

61408804969 is an equidigital number, since it uses as much as digits as its factorization.

61408804969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The spelling of 61408804969 in words is "sixty-one billion, four hundred eight million, eight hundred four thousand, nine hundred sixty-nine".