61406443692 has 144 divisors (see below), whose sum is σ = 170807180544. Its totient is φ = 18446736000.

The previous prime is 61406443639. The next prime is 61406443727. The reversal of 61406443692 is 29634460416.

61406443692 is a `hidden beast` number, since 6 + 140 + 6 + 443 + 69 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24260467 + ... + 24262997.

It is an arithmetic number, because the mean of its divisors is an integer number (1186160976).

Almost surely, 2^61406443692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61406443692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85403590272).

61406443692 is an abundant number, since it is smaller than the sum of its proper divisors (109400736852).

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

61406443692 is a wasteful number, since it uses less digits than its factorization.

61406443692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3055 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

It can be divided in two parts, 614064 and 43692, that added together give a palindrome (657756).

The spelling of 61406443692 in words is "sixty-one billion, four hundred six million, four hundred forty-three thousand, six hundred ninety-two".