61130140072 has 8 divisors (see below), whose sum is σ = 114619012650. Its totient is φ = 30565070032.

The previous prime is 61130140021. The next prime is 61130140079. The reversal of 61130140072 is 27004103116.

It can be written as a sum of positive squares in only one way, i.e., 47695939236 + 13434200836 = 218394^2 + 115906^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (61130140079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820633747 + ... + 3820633762.

Almost surely, 2^61130140072 is an apocalyptic number.

It is an amenable number.

61130140072 is a deficient number, since it is larger than the sum of its proper divisors (53488872578).

61130140072 is a wasteful number, since it uses less digits than its factorization.

61130140072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641267515 (or 7641267511 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 61130140072 its reverse (27004103116), we get a palindrome (88134243188).

The spelling of 61130140072 in words is "sixty-one billion, one hundred thirty million, one hundred forty thousand, seventy-two".