1245646126656 has 112 divisors (see below), whose sum is σ = 3877378966080. Its totient is φ = 390790932480.

The previous prime is 1245646126633. The next prime is 1245646126687. The reversal of 1245646126656 is 6566216465421.

1245646126656 is a `hidden beast` number, since 1 + 2 + 4 + 564 + 6 + 1 + 26 + 6 + 56 = 666.

It is a super-3 number, since 3×1245646126656³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21172390 + ... + 21231141.

Almost surely, 2^{1245646126656} is an apocalyptic number.

1245646126656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1245646126656 is an abundant number, since it is smaller than the sum of its proper divisors (2631732839424).

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

1245646126656 is a wasteful number, since it uses less digits than its factorization.

1245646126656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42403569 (or 42403553 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The spelling of 1245646126656 in words is "one trillion, two hundred forty-five billion, six hundred forty-six million, one hundred twenty-six thousand, six hundred fifty-six".