1182157438440 has 128 divisors (see below), whose sum is σ = 3875586549120. Its totient is φ = 286086758400.

The previous prime is 1182157438409. The next prime is 1182157438453. The reversal of 1182157438440 is 448347512811.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1182157438440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14421 + ... + 1537700.

It is an arithmetic number, because the mean of its divisors is an integer number (30278019915).

Almost surely, 2^{1182157438440} is an apocalyptic number.

1182157438440 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 1182157438440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937793274560).

1182157438440 is an abundant number, since it is smaller than the sum of its proper divisors (2693429110680).

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

1182157438440 is a wasteful number, since it uses less digits than its factorization.

1182157438440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552723 (or 1552719 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 1182157438440 in words is "one trillion, one hundred eighty-two billion, one hundred fifty-seven million, four hundred thirty-eight thousand, four hundred forty".