1266362015625 has 224 divisors, whose sum is σ = 2688365588480. Its totient is φ = 577125000000.

The previous prime is 1266362015599. The next prime is 1266362015629. The reversal of 1266362015625 is 5265102636621.

1266362015625 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 3 + 6 + 2 + 0 + 15 + 625 = 666.

It is not a de Polignac number, because 1266362015625 - 2¹² = 1266362011529 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1266362015629) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 1686234000 + ... + 1686234750.

Almost surely, 2^{1266362015625} is an apocalyptic number.

1266362015625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266362015625 is an abundant number, since it is smaller than the sum of its proper divisors (1422003572855).

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

1266362015625 is an frugal number, since it uses more digits than its factorization.

1266362015625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 1266362015625 in words is "one trillion, two hundred sixty-six billion, three hundred sixty-two million, fifteen thousand, six hundred twenty-five".