61015144545 has 24 divisors (see below), whose sum is σ = 105806742912. Its totient is φ = 32526900000.

The previous prime is 61015144513. The next prime is 61015144559. The reversal of 61015144545 is 54544151016.

61015144545 is a `hidden beast` number, since 6 + 101 + 5 + 1 + 4 + 4 + 545 = 666.

It is not a de Polignac number, because 61015144545 - 2⁵ = 61015144513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199881 + ... + 402470.

It is an arithmetic number, because the mean of its divisors is an integer number (4408614288).

Almost surely, 2^61015144545 is an apocalyptic number.

It is an amenable number.

61015144545 is a deficient number, since it is larger than the sum of its proper divisors (44791598367).

61015144545 is a wasteful number, since it uses less digits than its factorization.

61015144545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604613 (or 604610 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 61015144545 in words is "sixty-one billion, fifteen million, one hundred forty-four thousand, five hundred forty-five".