161678026656874 has 144 divisors (see below), whose sum is σ = 322215063691680. Its totient is φ = 60470726359680.

The previous prime is 161678026656859. The next prime is 161678026656877. The reversal of 161678026656874 is 478656620876161.

It is a super-2 number, since 2×161678026656874² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161678026656797 and 161678026656806.

It is not an unprimeable number, because it can be changed into a prime (161678026656877) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 153983692 + ... + 155030104.

It is an arithmetic number, because the mean of its divisors is an integer number (2237604608970).

Almost surely, 2^{161678026656874} is an apocalyptic number.

161678026656874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161678026656874 is a deficient number, since it is larger than the sum of its proper divisors (160537037034806).

161678026656874 is a wasteful number, since it uses less digits than its factorization.

161678026656874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046965 (or 1046945 counting only the distinct ones).

The product of its (nonzero) digits is 975421440, while the sum is 73.

The spelling of 161678026656874 in words is "one hundred sixty-one trillion, six hundred seventy-eight billion, twenty-six million, six hundred fifty-six thousand, eight hundred seventy-four".