61786770147 has 12 divisors (see below), whose sum is σ = 94497413400. Its totient is φ = 38768169408.

The previous prime is 61786770139. The next prime is 61786770167. The reversal of 61786770147 is 74107768716.

61786770147 is a `hidden beast` number, since 617 + 8 + 6 + 7 + 7 + 0 + 14 + 7 = 666.

It is not a de Polignac number, because 61786770147 - 2³ = 61786770139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61786770093 and 61786770102.

It is not an unprimeable number, because it can be changed into a prime (61786770167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201917397 + ... + 201917702.

It is an arithmetic number, because the mean of its divisors is an integer number (7874784450).

Almost surely, 2^61786770147 is an apocalyptic number.

61786770147 is a deficient number, since it is larger than the sum of its proper divisors (32710643253).

61786770147 is a wasteful number, since it uses less digits than its factorization.

61786770147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403835122 (or 403835119 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 54.

The spelling of 61786770147 in words is "sixty-one billion, seven hundred eighty-six million, seven hundred seventy thousand, one hundred forty-seven".