1215477738066 has 16 divisors (see below), whose sum is σ = 2431856196000. Its totient is φ = 405009126048.

The previous prime is 1215477738061. The next prime is 1215477738119. The reversal of 1215477738066 is 6608377745121.

It is a super-2 number, since 2×1215477738066² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1215477737997 and 1215477738015.

It is not an unprimeable number, because it can be changed into a prime (1215477738061) 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, 37512451 + ... + 37544838.

It is an arithmetic number, because the mean of its divisors is an integer number (151991012250).

Almost surely, 2^{1215477738066} is an apocalyptic number.

1215477738066 is an abundant number, since it is smaller than the sum of its proper divisors (1216378457934).

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

1215477738066 is a wasteful number, since it uses less digits than its factorization.

1215477738066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75059993.

The product of its (nonzero) digits is 11854080, while the sum is 57.

The spelling of 1215477738066 in words is "one trillion, two hundred fifteen billion, four hundred seventy-seven million, seven hundred thirty-eight thousand, sixty-six".