61444434134 has 64 divisors (see below), whose sum is σ = 101448253440. Its totient is φ = 27809308800.

The previous prime is 61444434131. The next prime is 61444434173. The reversal of 61444434134 is 43143444416.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61444434131) 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, 18033059 + ... + 18036465.

It is an arithmetic number, because the mean of its divisors is an integer number (1585128960).

Almost surely, 2^61444434134 is an apocalyptic number.

61444434134 is a deficient number, since it is larger than the sum of its proper divisors (40003819306).

61444434134 is a wasteful number, since it uses less digits than its factorization.

61444434134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693.

The product of its digits is 221184, while the sum is 38.

The spelling of 61444434134 in words is "sixty-one billion, four hundred forty-four million, four hundred thirty-four thousand, one hundred thirty-four".