61404140094 has 64 divisors (see below), whose sum is σ = 137239964928. Its totient is φ = 18154483200.

The previous prime is 61404140087. The next prime is 61404140099. The reversal of 61404140094 is 49004140416.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61404140099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2659062 + ... + 2682054.

It is an arithmetic number, because the mean of its divisors is an integer number (2144374452).

Almost surely, 2^61404140094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61404140094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68619982464).

61404140094 is an abundant number, since it is smaller than the sum of its proper divisors (75835824834).

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

61404140094 is a wasteful number, since it uses less digits than its factorization.

61404140094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23993.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 61404140094 in words is "sixty-one billion, four hundred four million, one hundred forty thousand, ninety-four".