61005156125 has 8 divisors (see below), whose sum is σ = 76134435000. Its totient is φ = 48804124800.

The previous prime is 61005156109. The next prime is 61005156143. The reversal of 61005156125 is 52165150016.

61005156125 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 4 ways, for example, as 12766062169 + 48239093956 = 112987^2 + 219634^2 .

It is not a de Polignac number, because 61005156125 - 2⁴ = 61005156109 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61005156091 and 61005156100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244020500 + ... + 244020749.

It is an arithmetic number, because the mean of its divisors is an integer number (9516804375).

Almost surely, 2^61005156125 is an apocalyptic number.

It is an amenable number.

61005156125 is a deficient number, since it is larger than the sum of its proper divisors (15129278875).

61005156125 is an equidigital number, since it uses as much as digits as its factorization.

61005156125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488041264 (or 488041254 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 61005156125 in words is "sixty-one billion, five million, one hundred fifty-six thousand, one hundred twenty-five".