61322545251 has 48 divisors (see below), whose sum is σ = 100715476992. Its totient is φ = 35616931200.

The previous prime is 61322545243. The next prime is 61322545267. The reversal of 61322545251 is 15254522316.

61322545251 is a `hidden beast` number, since 6 + 132 + 25 + 452 + 51 = 666.

61322545251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61322545251 - 2³ = 61322545243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61322545241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 219111 + ... + 413103.

It is an arithmetic number, because the mean of its divisors is an integer number (2098239104).

Almost surely, 2^61322545251 is an apocalyptic number.

61322545251 is a deficient number, since it is larger than the sum of its proper divisors (39392931741).

61322545251 is a wasteful number, since it uses less digits than its factorization.

61322545251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194144 (or 194141 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 61322545251 in words is "sixty-one billion, three hundred twenty-two million, five hundred forty-five thousand, two hundred fifty-one".