1015611601605 has 16 divisors (see below), whose sum is σ = 1647865586304. Its totient is φ = 534030512960.

The previous prime is 1015611601573. The next prime is 1015611601621. The reversal of 1015611601605 is 5061061165101.

It is not a de Polignac number, because 1015611601605 - 2⁵ = 1015611601573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476811894 + ... + 476814023.

It is an arithmetic number, because the mean of its divisors is an integer number (102991599144).

Almost surely, 2^{1015611601605} is an apocalyptic number.

1015611601605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1015611601605 is a deficient number, since it is larger than the sum of its proper divisors (632253984699).

1015611601605 is an equidigital number, since it uses as much as digits as its factorization.

1015611601605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953625996.

The product of its (nonzero) digits is 5400, while the sum is 33.

Adding to 1015611601605 its reverse (5061061165101), we get a palindrome (6076672766706).

The spelling of 1015611601605 in words is "one trillion, fifteen billion, six hundred eleven million, six hundred one thousand, six hundred five".