61147961530 has 8 divisors (see below), whose sum is σ = 110066330772. Its totient is φ = 24459184608.

The previous prime is 61147961507. The next prime is 61147961549. The reversal of 61147961530 is 3516974116.

It can be written as a sum of positive squares in 2 ways, for example, as 55583249121 + 5564712409 = 235761^2 + 74597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3057398067 + ... + 3057398086.

Almost surely, 2^61147961530 is an apocalyptic number.

61147961530 is a deficient number, since it is larger than the sum of its proper divisors (48918369242).

61147961530 is a wasteful number, since it uses less digits than its factorization.

61147961530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114796160.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 61147961530 in words is "sixty-one billion, one hundred forty-seven million, nine hundred sixty-one thousand, five hundred thirty".