161901626 has 16 divisors (see below), whose sum is σ = 246909600. Its totient is φ = 79607568.

The previous prime is 161901617. The next prime is 161901629. The reversal of 161901626 is 626109161.

161901626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161901592 and 161901601.

It is not an unprimeable number, because it can be changed into a prime (161901629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35885 + ... + 40143.

It is an arithmetic number, because the mean of its divisors is an integer number (15431850).

Almost surely, 2^161901626 is an apocalyptic number.

161901626 is a deficient number, since it is larger than the sum of its proper divisors (85007974).

161901626 is a wasteful number, since it uses less digits than its factorization.

161901626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 161901626 is about 12724.0569788099. The cubic root of 161901626 is about 545.0258114196.

The spelling of 161901626 in words is "one hundred sixty-one million, nine hundred one thousand, six hundred twenty-six".