61963091308209 has 384 divisors, whose sum is σ = 118673023795200. Its totient is φ = 28338884259840.

The previous prime is 61963091308201. The next prime is 61963091308241. The reversal of 61963091308209 is 90280319036916.

It is not a de Polignac number, because 61963091308209 - 2³ = 61963091308201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61963091308201) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 2304046767 + ... + 2304073659.

It is an arithmetic number, because the mean of its divisors is an integer number (309044332800).

Almost surely, 2^{61963091308209} is an apocalyptic number.

61963091308209 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

61963091308209 is a deficient number, since it is larger than the sum of its proper divisors (56709932486991).

61963091308209 is a wasteful number, since it uses less digits than its factorization.

61963091308209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27085 (or 27078 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 57.

The spelling of 61963091308209 in words is "sixty-one trillion, nine hundred sixty-three billion, ninety-one million, three hundred eight thousand, two hundred nine".