145268640194 has 4 divisors (see below), whose sum is σ = 217902960294. Its totient is φ = 72634320096.

The previous prime is 145268640173. The next prime is 145268640203. The reversal of 145268640194 is 491046862541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123507964969 + 21760675225 = 351437^2 + 147515^2 .

It is a super-2 number, since 2×145268640194² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36317160047 + ... + 36317160050.

Almost surely, 2^145268640194 is an apocalyptic number.

145268640194 is a deficient number, since it is larger than the sum of its proper divisors (72634320100).

145268640194 is an equidigital number, since it uses as much as digits as its factorization.

145268640194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72634320099.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 145268640194 in words is "one hundred forty-five billion, two hundred sixty-eight million, six hundred forty thousand, one hundred ninety-four".