61826146778 has 16 divisors (see below), whose sum is σ = 101554744896. Its totient is φ = 27995936640.

The previous prime is 61826146777. The next prime is 61826146793. The reversal of 61826146778 is 87764162816.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61826146777) 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, 5336951 + ... + 5348522.

It is an arithmetic number, because the mean of its divisors is an integer number (6347171556).

Almost surely, 2^61826146778 is an apocalyptic number.

61826146778 is a deficient number, since it is larger than the sum of its proper divisors (39728598118).

61826146778 is a wasteful number, since it uses less digits than its factorization.

61826146778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685749.

The product of its digits is 5419008, while the sum is 56.

The spelling of 61826146778 in words is "sixty-one billion, eight hundred twenty-six million, one hundred forty-six thousand, seven hundred seventy-eight".