61147566747 has 48 divisors (see below), whose sum is σ = 97371892800. Its totient is φ = 36817459200.

The previous prime is 61147566721. The next prime is 61147566769. The reversal of 61147566747 is 74766574116.

61147566747 is a `hidden beast` number, since 6 + 1 + 1 + 4 + 7 + 566 + 74 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-61147566747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61147566693 and 61147566702.

It is not an unprimeable number, because it can be changed into a prime (61147564747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 302754 + ... + 462552.

It is an arithmetic number, because the mean of its divisors is an integer number (2028581100).

Almost surely, 2^61147566747 is an apocalyptic number.

61147566747 is a deficient number, since it is larger than the sum of its proper divisors (36224326053).

61147566747 is a wasteful number, since it uses less digits than its factorization.

61147566747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159924 (or 159921 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The spelling of 61147566747 in words is "sixty-one billion, one hundred forty-seven million, five hundred sixty-six thousand, seven hundred forty-seven".