61022540012 has 24 divisors (see below), whose sum is σ = 122323111680. Its totient is φ = 26092938960.

The previous prime is 61022540011. The next prime is 61022540039. The reversal of 61022540012 is 21004522016.

It is a happy number.

It is a super-2 number, since 2×61022540012² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61022540012.

It is not an unprimeable number, because it can be changed into a prime (61022540011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2469914 + ... + 2494497.

It is an arithmetic number, because the mean of its divisors is an integer number (5096796320).

Almost surely, 2^61022540012 is an apocalyptic number.

It is an amenable number.

61022540012 is an abundant number, since it is smaller than the sum of its proper divisors (61300571668).

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

61022540012 is a wasteful number, since it uses less digits than its factorization.

61022540012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964861 (or 4964859 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 61022540012 in words is "sixty-one billion, twenty-two million, five hundred forty thousand, twelve".