145194402691 has 8 divisors (see below), whose sum is σ = 163161603360. Its totient is φ = 128198402112.

The previous prime is 145194402653. The next prime is 145194402707. The reversal of 145194402691 is 196204491541.

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 145194402691 - 2¹¹ = 145194400643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145194402611) 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, 242799706 + ... + 242800303.

It is an arithmetic number, because the mean of its divisors is an integer number (20395200420).

Almost surely, 2^145194402691 is an apocalyptic number.

145194402691 is a deficient number, since it is larger than the sum of its proper divisors (17967200669).

145194402691 is a wasteful number, since it uses less digits than its factorization.

145194402691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485600045.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 145194402691 in words is "one hundred forty-five billion, one hundred ninety-four million, four hundred two thousand, six hundred ninety-one".