1269630998740 has 72 divisors (see below), whose sum is σ = 2889056629368. Its totient is φ = 468468449280.

The previous prime is 1269630998723. The next prime is 1269630998767. The reversal of 1269630998740 is 478990369621.

It can be written as a sum of positive squares in 12 ways, for example, as 871437186064 + 398193812676 = 933508^2 + 631026^2 .

It is a super-2 number, since 2×1269630998740² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4878964 + ... + 5132596.

It is an arithmetic number, because the mean of its divisors is an integer number (40125786519).

Almost surely, 2^{1269630998740} is an apocalyptic number.

1269630998740 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 1269630998740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444528314684).

1269630998740 is an abundant number, since it is smaller than the sum of its proper divisors (1619425630628).

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

1269630998740 is a wasteful number, since it uses less digits than its factorization.

1269630998740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255149 (or 255134 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 64.

The spelling of 1269630998740 in words is "one trillion, two hundred sixty-nine billion, six hundred thirty million, nine hundred ninety-eight thousand, seven hundred forty".