5515661155501 has 8 divisors (see below), whose sum is σ = 6577682868864. Its totient is φ = 4522156972080.

The previous prime is 5515661155489. The next prime is 5515661155549. The reversal of 5515661155501 is 1055511665155.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5515661155501 - 2¹⁵ = 5515661122733 is a prime.

It is a super-2 number, since 2×5515661155501² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515661105501) 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, 17129382310 + ... + 17129382631.

It is an arithmetic number, because the mean of its divisors is an integer number (822210358608).

Almost surely, 2^{5515661155501} is an apocalyptic number.

It is an amenable number.

5515661155501 is a deficient number, since it is larger than the sum of its proper divisors (1062021713363).

5515661155501 is a wasteful number, since it uses less digits than its factorization.

5515661155501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34258764971.

The product of its (nonzero) digits is 562500, while the sum is 46.

The spelling of 5515661155501 in words is "five trillion, five hundred fifteen billion, six hundred sixty-one million, one hundred fifty-five thousand, five hundred one".