1249829161780 has 96 divisors (see below), whose sum is σ = 2724620976000. Its totient is φ = 481273540608.

The previous prime is 1249829161771. The next prime is 1249829161783. The reversal of 1249829161780 is 871619289421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249829161783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17359296 + ... + 17431144.

It is an arithmetic number, because the mean of its divisors is an integer number (28381468500).

Almost surely, 2^{1249829161780} is an apocalyptic number.

1249829161780 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 1249829161780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1362310488000).

1249829161780 is an abundant number, since it is smaller than the sum of its proper divisors (1474791814220).

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

1249829161780 is a wasteful number, since it uses less digits than its factorization.

1249829161780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72193 (or 72191 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 1249829161780 in words is "one trillion, two hundred forty-nine billion, eight hundred twenty-nine million, one hundred sixty-one thousand, seven hundred eighty".