149923065601 has 3 divisors (see below), whose sum is σ = 149923452801. Its totient is φ = 149922678402.

The previous prime is 149923065547. The next prime is 149923065619. The reversal of 149923065601 is 106560329941.

The square root of 149923065601 is 387199.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 149923065601 - 2¹⁹ = 149922541313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149923065641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 193600 + ... + 580798.

It is an arithmetic number, because the mean of its divisors is an integer number (49974484267).

Almost surely, 2^149923065601 is an apocalyptic number.

149923065601 is the 387199-th square number.

149923065601 is the 193600-th centered octagonal number.

It is an amenable number.

149923065601 is a deficient number, since it is larger than the sum of its proper divisors (387200).

149923065601 is an frugal number, since it uses more digits than its factorization.

149923065601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774398 (or 387199 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 149923065601 in words is "one hundred forty-nine billion, nine hundred twenty-three million, sixty-five thousand, six hundred one".