61844940403 has 4 divisors (see below), whose sum is σ = 61855001008. Its totient is φ = 61834879800.

The previous prime is 61844940401. The next prime is 61844940427. The reversal of 61844940403 is 30404944816.

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 61844940403 - 2¹ = 61844940401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61844940403.

It is not an unprimeable number, because it can be changed into a prime (61844940401) 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, 5021076 + ... + 5033377.

It is an arithmetic number, because the mean of its divisors is an integer number (15463750252).

Almost surely, 2^61844940403 is an apocalyptic number.

61844940403 is a deficient number, since it is larger than the sum of its proper divisors (10060605).

61844940403 is a wasteful number, since it uses less digits than its factorization.

61844940403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060604.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 61844940403 in words is "sixty-one billion, eight hundred forty-four million, nine hundred forty thousand, four hundred three".