1215530374608 has 80 divisors (see below), whose sum is σ = 3806206238400. Its totient is φ = 368342536320.

The previous prime is 1215530374603. The next prime is 1215530374661. The reversal of 1215530374608 is 8064730355121.

It is a happy number.

1215530374608 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 5 + 3 + 0 + 37 + 4 + 608 = 666.

It is a super-2 number, since 2×1215530374608² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215530374603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127891963 + ... + 127901466.

It is an arithmetic number, because the mean of its divisors is an integer number (47577577980).

Almost surely, 2^{1215530374608} is an apocalyptic number.

1215530374608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1215530374608 is an abundant number, since it is smaller than the sum of its proper divisors (2590675863792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215530374608 is a wasteful number, since it uses less digits than its factorization.

1215530374608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255793457 (or 255793445 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 1215530374608 in words is "one trillion, two hundred fifteen billion, five hundred thirty million, three hundred seventy-four thousand, six hundred eight".