1215153576045 has 24 divisors (see below), whose sum is σ = 2106295222200. Its totient is φ = 648072976896.

The previous prime is 1215153576041. The next prime is 1215153576101. The reversal of 1215153576045 is 5406753515121.

1215153576045 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 1 + 5 + 35 + 7 + 604 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 189695529 + 1214963880516 = 13773^2 + 1102254^2 .

It is not a de Polignac number, because 1215153576045 - 2² = 1215153576041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215153576041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4309761 + ... + 4583049.

It is an arithmetic number, because the mean of its divisors is an integer number (87762300925).

Almost surely, 2^{1215153576045} is an apocalyptic number.

1215153576045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215153576045 is a deficient number, since it is larger than the sum of its proper divisors (891141646155).

1215153576045 is a wasteful number, since it uses less digits than its factorization.

1215153576045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372109 (or 372106 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 45.

The spelling of 1215153576045 in words is "one trillion, two hundred fifteen billion, one hundred fifty-three million, five hundred seventy-six thousand, forty-five".