61186752040 has 32 divisors (see below), whose sum is σ = 139609215360. Its totient is φ = 24129985600.

The previous prime is 61186752031. The next prime is 61186752043. The reversal of 61186752040 is 4025768116.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 61186751984 and 61186752002.

It is not an unprimeable number, because it can be changed into a prime (61186752043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10769476 + ... + 10775155.

It is an arithmetic number, because the mean of its divisors is an integer number (4362787980).

Almost surely, 2^61186752040 is an apocalyptic number.

It is an amenable number.

61186752040 is an abundant number, since it is smaller than the sum of its proper divisors (78422463320).

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

61186752040 is a wasteful number, since it uses less digits than its factorization.

61186752040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21544713 (or 21544709 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 61186752040 in words is "sixty-one billion, one hundred eighty-six million, seven hundred fifty-two thousand, forty".