6615151515601 has 4 divisors (see below), whose sum is σ = 6902766798912. Its totient is φ = 6327536232292.

The previous prime is 6615151515551. The next prime is 6615151515619. The reversal of 6615151515601 is 1065151515166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6615151515601 - 2¹⁵ = 6615151482833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6615151513601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143807641621 + ... + 143807641666.

It is an arithmetic number, because the mean of its divisors is an integer number (1725691699728).

Almost surely, 2^{6615151515601} is an apocalyptic number.

It is an amenable number.

6615151515601 is a deficient number, since it is larger than the sum of its proper divisors (287615283311).

6615151515601 is a wasteful number, since it uses less digits than its factorization.

6615151515601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287615283310.

The product of its (nonzero) digits is 135000, while the sum is 43.

The spelling of 6615151515601 in words is "six trillion, six hundred fifteen billion, one hundred fifty-one million, five hundred fifteen thousand, six hundred one".