61463810916 has 36 divisors (see below), whose sum is σ = 155857000572. Its totient is φ = 20423302464.

The previous prime is 61463810861. The next prime is 61463810927. The reversal of 61463810916 is 61901836416.

61463810916 is a `hidden beast` number, since 6 + 1 + 4 + 638 + 1 + 0 + 9 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35064060516 + 26399750400 = 187254^2 + 162480^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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, 2681535 + ... + 2704358.

It is an arithmetic number, because the mean of its divisors is an integer number (4329361127).

Almost surely, 2^61463810916 is an apocalyptic number.

It is an amenable number.

61463810916 is an abundant number, since it is smaller than the sum of its proper divisors (94393189656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61463810916 is a wasteful number, since it uses less digits than its factorization.

61463810916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386220 (or 5386215 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 61463810916 in words is "sixty-one billion, four hundred sixty-three million, eight hundred ten thousand, nine hundred sixteen".