155610488561 has 8 divisors (see below), whose sum is σ = 169767142464. Its totient is φ = 141455542320.

The previous prime is 155610488543. The next prime is 155610488711. The reversal of 155610488561 is 165884016551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155610488561 is a prime.

It is a super-2 number, since 2×155610488561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155610488531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232526 + ... + 604391.

It is an arithmetic number, because the mean of its divisors is an integer number (21220892808).

Almost surely, 2^155610488561 is an apocalyptic number.

155610488561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155610488561 is a deficient number, since it is larger than the sum of its proper divisors (14156653903).

155610488561 is a wasteful number, since it uses less digits than its factorization.

155610488561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853831.

The product of its (nonzero) digits is 1152000, while the sum is 50.

The spelling of 155610488561 in words is "one hundred fifty-five billion, six hundred ten million, four hundred eighty-eight thousand, five hundred sixty-one".