1878406693740 has 72 divisors (see below), whose sum is σ = 5701260784128. Its totient is φ = 500607164160.

The previous prime is 1878406693729. The next prime is 1878406693747. The reversal of 1878406693740 is 473966048781.

1878406693740 is a `hidden beast` number, since 1 + 8 + 78 + 406 + 6 + 93 + 74 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (1878406693747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2838241 + ... + 3436920.

Almost surely, 2^{1878406693740} is an apocalyptic number.

1878406693740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1878406693740 is an abundant number, since it is smaller than the sum of its proper divisors (3822854090388).

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

1878406693740 is a wasteful number, since it uses less digits than its factorization.

1878406693740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6276839 (or 6276834 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 1878406693740 in words is "one trillion, eight hundred seventy-eight billion, four hundred six million, six hundred ninety-three thousand, seven hundred forty".