201612644615 has 32 divisors (see below), whose sum is σ = 250772457600. Its totient is φ = 155485384704.

The previous prime is 201612644609. The next prime is 201612644617. The reversal of 201612644615 is 516446216102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201612644615 - 2³⁴ = 184432775431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201612644617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9659711 + ... + 9680559.

It is an arithmetic number, because the mean of its divisors is an integer number (7836639300).

Almost surely, 2^201612644615 is an apocalyptic number.

201612644615 is a deficient number, since it is larger than the sum of its proper divisors (49159812985).

201612644615 is a wasteful number, since it uses less digits than its factorization.

201612644615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21371.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 201612644615 in words is "two hundred one billion, six hundred twelve million, six hundred forty-four thousand, six hundred fifteen".