61800208407 has 36 divisors (see below), whose sum is σ = 106256109960. Its totient is φ = 34493128992.

The previous prime is 61800208399. The next prime is 61800208417. The reversal of 61800208407 is 70480200816.

It is not a de Polignac number, because 61800208407 - 2³ = 61800208399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61800208417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1610532 + ... + 1648457.

It is an arithmetic number, because the mean of its divisors is an integer number (2951558610).

Almost surely, 2^61800208407 is an apocalyptic number.

61800208407 is a deficient number, since it is larger than the sum of its proper divisors (44455901553).

61800208407 is a wasteful number, since it uses less digits than its factorization.

61800208407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259052 (or 3259042 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 61800208407 in words is "sixty-one billion, eight hundred million, two hundred eight thousand, four hundred seven".