1226297537640 has 1024 divisors, whose sum is σ = 4917749760000. Its totient is φ = 271532943360.

The previous prime is 1226297537627. The next prime is 1226297537653. The reversal of 1226297537640 is 467357926221.

1226297537640 is a `hidden beast` number, since 1 + 2 + 2 + 62 + 9 + 7 + 537 + 6 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (1226297537627) and next prime (1226297537653).

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 255 ways as a sum of consecutive naturals, for example, 3994454367 + ... + 3994454673.

It is an arithmetic number, because the mean of its divisors is an integer number (4802490000).

Almost surely, 2^{1226297537640} is an apocalyptic number.

1226297537640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226297537640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2458874880000).

1226297537640 is an abundant number, since it is smaller than the sum of its proper divisors (3691452222360).

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

1226297537640 is a wasteful number, since it uses less digits than its factorization.

1226297537640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 1226297537640 in words is "one trillion, two hundred twenty-six billion, two hundred ninety-seven million, five hundred thirty-seven thousand, six hundred forty".