61894100785 has 8 divisors (see below), whose sum is σ = 81025004736. Its totient is φ = 45013891440.

The previous prime is 61894100777. The next prime is 61894100791. The reversal of 61894100785 is 58700149816.

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

It is not a de Polignac number, because 61894100785 - 2³ = 61894100777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 562673589 + ... + 562673698.

It is an arithmetic number, because the mean of its divisors is an integer number (10128125592).

Almost surely, 2^61894100785 is an apocalyptic number.

It is an amenable number.

61894100785 is a deficient number, since it is larger than the sum of its proper divisors (19130903951).

61894100785 is a wasteful number, since it uses less digits than its factorization.

61894100785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125347303.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 61894100785 in words is "sixty-one billion, eight hundred ninety-four million, one hundred thousand, seven hundred eighty-five".