1215726254460 has 144 divisors (see below), whose sum is σ = 3916145993760. Its totient is φ = 304412774400.

The previous prime is 1215726254453. The next prime is 1215726254467. The reversal of 1215726254460 is 644526275121.

1215726254460 is a `hidden beast` number, since 1 + 2 + 15 + 7 + 2 + 625 + 4 + 4 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1215726254453) and next prime (1215726254467).

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 (1215726254467) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1186441 + ... + 1959360.

It is an arithmetic number, because the mean of its divisors is an integer number (27195458290).

Almost surely, 2^{1215726254460} is an apocalyptic number.

1215726254460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215726254460 is an abundant number, since it is smaller than the sum of its proper divisors (2700419739300).

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

1215726254460 is a wasteful number, since it uses less digits than its factorization.

1215726254460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145948 (or 3145943 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 1215726254460 in words is "one trillion, two hundred fifteen billion, seven hundred twenty-six million, two hundred fifty-four thousand, four hundred sixty".