61115555006506 has 32 divisors (see below), whose sum is σ = 123085873024128. Its totient is φ = 21979620181440.

The previous prime is 61115555006423. The next prime is 61115555006507. The reversal of 61115555006506 is 60560055551116.

It is a happy number.

It is a super-2 number, since 2×61115555006506² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61115555006507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15263623125 + ... + 15263627128.

It is an arithmetic number, because the mean of its divisors is an integer number (3846433532004).

Almost surely, 2^{61115555006506} is an apocalyptic number.

61115555006506 is an abundant number, since it is smaller than the sum of its proper divisors (61970318017622).

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

61115555006506 is a wasteful number, since it uses less digits than its factorization.

61115555006506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30527250286.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 61115555006506 in words is "sixty-one trillion, one hundred fifteen billion, five hundred fifty-five million, six thousand, five hundred six".