201278134577 has 16 divisors (see below), whose sum is σ = 218179452288. Its totient is φ = 184582056960.

The previous prime is 201278134529. The next prime is 201278134583. The reversal of 201278134577 is 775431872102.

It is a cyclic number.

It is not a de Polignac number, because 201278134577 - 2¹⁴ = 201278118193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201278184577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1810202 + ... + 1918172.

It is an arithmetic number, because the mean of its divisors is an integer number (13636215768).

Almost surely, 2^201278134577 is an apocalyptic number.

It is an amenable number.

201278134577 is a deficient number, since it is larger than the sum of its proper divisors (16901317711).

201278134577 is a wasteful number, since it uses less digits than its factorization.

201278134577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108920.

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 201278134577 in words is "two hundred one billion, two hundred seventy-eight million, one hundred thirty-four thousand, five hundred seventy-seven".