161621470 has 16 divisors (see below), whose sum is σ = 293211648. Its totient is φ = 64139040.

The previous prime is 161621459. The next prime is 161621531. The reversal of 161621470 is 74126161.

161621470 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161621470² = 52242999129921800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62361 + ... + 64900.

It is an arithmetic number, because the mean of its divisors is an integer number (18325728).

Almost surely, 2^161621470 is an apocalyptic number.

161621470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161621470 is a deficient number, since it is larger than the sum of its proper divisors (131590178).

161621470 is a wasteful number, since it uses less digits than its factorization.

161621470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127395.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 161621470 is about 12713.0433020579. The cubic root of 161621470 is about 544.7112574255.

The spelling of 161621470 in words is "one hundred sixty-one million, six hundred twenty-one thousand, four hundred seventy".