61967821403 has 4 divisors (see below), whose sum is σ = 62179315968. Its totient is φ = 61756326840.

The previous prime is 61967821397. The next prime is 61967821427. The reversal of 61967821403 is 30412876916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61967821403 - 2¹⁰ = 61967820379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61967821463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105746843 + ... + 105747428.

It is an arithmetic number, because the mean of its divisors is an integer number (15544828992).

Almost surely, 2^61967821403 is an apocalyptic number.

61967821403 is a deficient number, since it is larger than the sum of its proper divisors (211494565).

61967821403 is a wasteful number, since it uses less digits than its factorization.

61967821403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211494564.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 61967821403 in words is "sixty-one billion, nine hundred sixty-seven million, eight hundred twenty-one thousand, four hundred three".