1249542658980 has 1152 divisors, whose sum is σ = 5021469573120. Its totient is φ = 253326528000.

The previous prime is 1249542658943. The next prime is 1249542658999. The reversal of 1249542658980 is 898562459421.

1249542658980 is a `hidden beast` number, since 1 + 2 + 4 + 9 + 5 + 42 + 6 + 589 + 8 + 0 = 666.

It is a super-2 number, since 2×1249542658980² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3480620041 + ... + 3480620399.

It is an arithmetic number, because the mean of its divisors is an integer number (4358914560).

Almost surely, 2^{1249542658980} is an apocalyptic number.

1249542658980 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 1249542658980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2510734786560).

1249542658980 is an abundant number, since it is smaller than the sum of its proper divisors (3771926914140).

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

1249542658980 is a wasteful number, since it uses less digits than its factorization.

1249542658980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 63.

The spelling of 1249542658980 in words is "one trillion, two hundred forty-nine billion, five hundred forty-two million, six hundred fifty-eight thousand, nine hundred eighty".