61106996556 has 36 divisors (see below), whose sum is σ = 154472409000. Its totient is φ = 20368009728.

The previous prime is 61106996543. The next prime is 61106996557. The reversal of 61106996556 is 65569960116.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×61106996556² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61106996557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1423495 + ... + 1465793.

It is an arithmetic number, because the mean of its divisors is an integer number (4290900250).

Almost surely, 2^61106996556 is an apocalyptic number.

It is an amenable number.

61106996556 is an abundant number, since it is smaller than the sum of its proper divisors (93365412444).

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

61106996556 is a wasteful number, since it uses less digits than its factorization.

61106996556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82438 (or 82433 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 61106996556 in words is "sixty-one billion, one hundred six million, nine hundred ninety-six thousand, five hundred fifty-six".