312105558840 has 128 divisors (see below), whose sum is σ = 1043572896000. Its totient is φ = 74209609728.

The previous prime is 312105558827. The next prime is 312105558851. The reversal of 312105558840 is 48855501213.

It is a junction number, because it is equal to n+sod(n) for n = 312105558792 and 312105558801.

It is a congruent number.

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, 3987370 + ... + 4064889.

It is an arithmetic number, because the mean of its divisors is an integer number (8152913250).

Almost surely, 2^312105558840 is an apocalyptic number.

312105558840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312105558840 is an abundant number, since it is smaller than the sum of its proper divisors (731467337160).

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

312105558840 is a wasteful number, since it uses less digits than its factorization.

312105558840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8052309 (or 8052305 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 42.

The spelling of 312105558840 in words is "three hundred twelve billion, one hundred five million, five hundred fifty-eight thousand, eight hundred forty".