1920678659880 has 384 divisors, whose sum is σ = 6460910784000. Its totient is φ = 455417303040.

The previous prime is 1920678659857. The next prime is 1920678659903. The reversal of 1920678659880 is 889568760291.

It is an interprime number because it is at equal distance from previous prime (1920678659857) and next prime (1920678659903).

It is a super-2 number, since 2×1920678659880² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 249726835 + ... + 249734525.

It is an arithmetic number, because the mean of its divisors is an integer number (16825288500).

Almost surely, 2^{1920678659880} is an apocalyptic number.

1920678659880 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 1920678659880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3230455392000).

1920678659880 is an abundant number, since it is smaller than the sum of its proper divisors (4540232124120).

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

1920678659880 is a wasteful number, since it uses less digits than its factorization.

1920678659880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8137 (or 8116 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 69.

The spelling of 1920678659880 in words is "one trillion, nine hundred twenty billion, six hundred seventy-eight million, six hundred fifty-nine thousand, eight hundred eighty".