151661641 has 8 divisors (see below), whose sum is σ = 165763584. Its totient is φ = 138135360.

The previous prime is 151661639. The next prime is 151661687. The reversal of 151661641 is 146166151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 151661641 - 2¹ = 151661639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151661441) 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, 143365 + ... + 144418.

It is an arithmetic number, because the mean of its divisors is an integer number (20720448).

Almost surely, 2^151661641 is an apocalyptic number.

It is an amenable number.

151661641 is a deficient number, since it is larger than the sum of its proper divisors (14101943).

151661641 is a wasteful number, since it uses less digits than its factorization.

151661641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287831.

The product of its digits is 4320, while the sum is 31.

The square root of 151661641 is about 12315.0980913674. The cubic root of 151661641 is about 533.2840365460.

It can be divided in two parts, 15166 and 1641, that added together give a 5-th power (16807 = 7⁵).

The spelling of 151661641 in words is "one hundred fifty-one million, six hundred sixty-one thousand, six hundred forty-one".