61047975620 has 24 divisors (see below), whose sum is σ = 128206373400. Its totient is φ = 24418118912.

The previous prime is 61047975617. The next prime is 61047975643. The reversal of 61047975620 is 2657974016.

It can be written as a sum of positive squares in 4 ways, for example, as 1198267456 + 59849708164 = 34616^2 + 244642^2 .

It is a super-2 number, since 2×61047975620² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530186 + ... + 634974.

It is an arithmetic number, because the mean of its divisors is an integer number (5341932225).

Almost surely, 2^61047975620 is an apocalyptic number.

It is an amenable number.

61047975620 is an abundant number, since it is smaller than the sum of its proper divisors (67158397780).

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

61047975620 is a wasteful number, since it uses less digits than its factorization.

61047975620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133927 (or 133925 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 61047975620 in words is "sixty-one billion, forty-seven million, nine hundred seventy-five thousand, six hundred twenty".