61111511550556 has 24 divisors (see below), whose sum is σ = 110472026603904. Its totient is φ = 29549451056640.

The previous prime is 61111511550527. The next prime is 61111511550569. The reversal of 61111511550556 is 65505511511116.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171781405 + ... + 172136788.

It is an arithmetic number, because the mean of its divisors is an integer number (4603001108496).

Almost surely, 2^{61111511550556} is an apocalyptic number.

It is an amenable number.

61111511550556 is a deficient number, since it is larger than the sum of its proper divisors (49360515053348).

61111511550556 is a wasteful number, since it uses less digits than its factorization.

61111511550556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343919661 (or 343919659 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 43.

The spelling of 61111511550556 in words is "sixty-one trillion, one hundred eleven billion, five hundred eleven million, five hundred fifty thousand, five hundred fifty-six".