61140561616 has 10 divisors (see below), whose sum is σ = 118459838162. Its totient is φ = 30570280800.

The previous prime is 61140561571. The next prime is 61140561617. The reversal of 61140561616 is 61616504116.

61140561616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 50095392400 + 11045169216 = 223820^2 + 105096^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61140561617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910642535 + ... + 1910642566.

Almost surely, 2^61140561616 is an apocalyptic number.

It is an amenable number.

61140561616 is a deficient number, since it is larger than the sum of its proper divisors (57319276546).

61140561616 is a wasteful number, since it uses less digits than its factorization.

61140561616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821285109 (or 3821285103 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 61140561616 in words is "sixty-one billion, one hundred forty million, five hundred sixty-one thousand, six hundred sixteen".