396861734165190 has 256 divisors, whose sum is σ = 1153656006912000. Its totient is φ = 85294626988032.

The previous prime is 396861734165189. The next prime is 396861734165219. The reversal of 396861734165190 is 91561437168693.

It is a super-2 number, since 2×396861734165190² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 27277588036 + ... + 27277602584.

It is an arithmetic number, because the mean of its divisors is an integer number (4506468777000).

Almost surely, 2^{396861734165190} is an apocalyptic number.

396861734165190 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 396861734165190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576828003456000).

396861734165190 is an abundant number, since it is smaller than the sum of its proper divisors (756794272746810).

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

396861734165190 is a wasteful number, since it uses less digits than its factorization.

396861734165190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21279.

The product of its (nonzero) digits is 176359680, while the sum is 69.

The spelling of 396861734165190 in words is "three hundred ninety-six trillion, eight hundred sixty-one billion, seven hundred thirty-four million, one hundred sixty-five thousand, one hundred ninety".