61951781245 has 8 divisors (see below), whose sum is σ = 74348382816. Its totient is φ = 49557261456.

The previous prime is 61951781189. The next prime is 61951781263. The reversal of 61951781245 is 54218715916.

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

It is a cyclic number.

It is not a de Polignac number, because 61951781245 - 2⁹ = 61951780733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454207 + ... + 574636.

It is an arithmetic number, because the mean of its divisors is an integer number (9293547852).

Almost surely, 2^61951781245 is an apocalyptic number.

It is an amenable number.

61951781245 is a deficient number, since it is larger than the sum of its proper divisors (12396601571).

61951781245 is a wasteful number, since it uses less digits than its factorization.

61951781245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040891.

The product of its digits is 604800, while the sum is 49.

The spelling of 61951781245 in words is "sixty-one billion, nine hundred fifty-one million, seven hundred eighty-one thousand, two hundred forty-five".