151661107491 has 8 divisors (see below), whose sum is σ = 202724168784. Its totient is φ = 100852725600.

The previous prime is 151661107453. The next prime is 151661107501. The reversal of 151661107491 is 194701166151.

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

It is not a de Polignac number, because 151661107491 - 2¹⁹ = 151660583203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151661127491) 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, 63668460 + ... + 63670841.

It is an arithmetic number, because the mean of its divisors is an integer number (25340521098).

Almost surely, 2^151661107491 is an apocalyptic number.

151661107491 is a deficient number, since it is larger than the sum of its proper divisors (51063061293).

151661107491 is a wasteful number, since it uses less digits than its factorization.

151661107491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127339701.

The product of its (nonzero) digits is 45360, while the sum is 42.

The spelling of 151661107491 in words is "one hundred fifty-one billion, six hundred sixty-one million, one hundred seven thousand, four hundred ninety-one".