61844940402 has 32 divisors (see below), whose sum is σ = 143677244544. Its totient is φ = 17380310400.

The previous prime is 61844940401. The next prime is 61844940427. The reversal of 61844940402 is 20404944816.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 15 ways as a sum of consecutive naturals, for example, 12067099 + ... + 12072222.

It is an arithmetic number, because the mean of its divisors is an integer number (4489913892).

Almost surely, 2^61844940402 is an apocalyptic number.

61844940402 is an abundant number, since it is smaller than the sum of its proper divisors (81832304142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61844940402 is a wasteful number, since it uses less digits than its factorization.

61844940402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24139394.

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 61844940402 in words is "sixty-one billion, eight hundred forty-four million, nine hundred forty thousand, four hundred two".