1181578894940 has 24 divisors (see below), whose sum is σ = 2505883165632. Its totient is φ = 467952036800.

The previous prime is 1181578894939. The next prime is 1181578894949. The reversal of 1181578894940 is 494988751811.

It is a super-2 number, since 2×1181578894940² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181578894949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292468004 + ... + 292472043.

It is an arithmetic number, because the mean of its divisors is an integer number (104411798568).

Almost surely, 2^{1181578894940} is an apocalyptic number.

1181578894940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181578894940 is an abundant number, since it is smaller than the sum of its proper divisors (1324304270692).

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

1181578894940 is a wasteful number, since it uses less digits than its factorization.

1181578894940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584940157 (or 584940155 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 65.

The spelling of 1181578894940 in words is "one trillion, one hundred eighty-one billion, five hundred seventy-eight million, eight hundred ninety-four thousand, nine hundred forty".