61945351434 has 48 divisors (see below), whose sum is σ = 144056687112. Its totient is φ = 19167611904.

The previous prime is 61945351357. The next prime is 61945351439. The reversal of 61945351434 is 43415354916.

61945351434 is a `hidden beast` number, since 61 + 9 + 45 + 3 + 514 + 34 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61724918025 + 220433409 = 248445^2 + 14847^2 .

It is a super-3 number, since 3×61945351434³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61945351434.

It is not an unprimeable number, because it can be changed into a prime (61945351439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1364209 + ... + 1408884.

Almost surely, 2^61945351434 is an apocalyptic number.

61945351434 is an abundant number, since it is smaller than the sum of its proper divisors (82111335678).

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

61945351434 is a wasteful number, since it uses less digits than its factorization.

61945351434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773191 (or 2773188 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 61945351434 in words is "sixty-one billion, nine hundred forty-five million, three hundred fifty-one thousand, four hundred thirty-four".