61155600140 has 24 divisors (see below), whose sum is σ = 128553581520. Its totient is φ = 24438083648.

The previous prime is 61155600139. The next prime is 61155600161. The reversal of 61155600140 is 4100655116.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489010 + ... + 1529529.

It is an arithmetic number, because the mean of its divisors is an integer number (5356399230).

Almost surely, 2^61155600140 is an apocalyptic number.

It is an amenable number.

61155600140 is an abundant number, since it is smaller than the sum of its proper divisors (67397981380).

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

61155600140 is a wasteful number, since it uses less digits than its factorization.

61155600140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019561 (or 3019559 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 61155600140 in words is "sixty-one billion, one hundred fifty-five million, six hundred thousand, one hundred forty".