61123517847 has 24 divisors (see below), whose sum is σ = 100912516640. Its totient is φ = 34924193280.

The previous prime is 61123517839. The next prime is 61123517881. The reversal of 61123517847 is 74871532116.

61123517847 is a `hidden beast` number, since 6 + 1 + 123 + 517 + 8 + 4 + 7 = 666.

It is not a de Polignac number, because 61123517847 - 2³ = 61123517839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61123517827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 659679 + ... + 746607.

Almost surely, 2^61123517847 is an apocalyptic number.

61123517847 is a deficient number, since it is larger than the sum of its proper divisors (39788998793).

61123517847 is a wasteful number, since it uses less digits than its factorization.

61123517847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98103 (or 98100 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The spelling of 61123517847 in words is "sixty-one billion, one hundred twenty-three million, five hundred seventeen thousand, eight hundred forty-seven".