61954129439 has 8 divisors (see below), whose sum is σ = 64122600000. Its totient is φ = 59787800352.

The previous prime is 61954129429. The next prime is 61954129459. The reversal of 61954129439 is 93492145916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61954129439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61954129429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476384 + ... + 592325.

It is an arithmetic number, because the mean of its divisors is an integer number (8015325000).

Almost surely, 2^61954129439 is an apocalyptic number.

61954129439 is a deficient number, since it is larger than the sum of its proper divisors (2168470561).

61954129439 is a wasteful number, since it uses less digits than its factorization.

61954129439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070737.

The product of its digits is 2099520, while the sum is 53.

The spelling of 61954129439 in words is "sixty-one billion, nine hundred fifty-four million, one hundred twenty-nine thousand, four hundred thirty-nine".