61151556568 has 16 divisors (see below), whose sum is σ = 114674402880. Its totient is φ = 30571715808.

The previous prime is 61151556551. The next prime is 61151556593. The reversal of 61151556568 is 86565515116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443355 + ... + 564682.

It is an arithmetic number, because the mean of its divisors is an integer number (7167150180).

Almost surely, 2^61151556568 is an apocalyptic number.

It is an amenable number.

61151556568 is a deficient number, since it is larger than the sum of its proper divisors (53522846312).

61151556568 is a wasteful number, since it uses less digits than its factorization.

61151556568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015626 (or 1015622 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 49.

The spelling of 61151556568 in words is "sixty-one billion, one hundred fifty-one million, five hundred fifty-six thousand, five hundred sixty-eight".