511601616651 has 16 divisors (see below), whose sum is σ = 699032869920. Its totient is φ = 332625242880.

The previous prime is 511601616629. The next prime is 511601616803. The reversal of 511601616651 is 156616106115.

It is not a de Polignac number, because 511601616651 - 2¹³ = 511601608459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (511605616651) 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, 441016 + ... + 1103493.

It is an arithmetic number, because the mean of its divisors is an integer number (43689554370).

Almost surely, 2^511601616651 is an apocalyptic number.

511601616651 is a deficient number, since it is larger than the sum of its proper divisors (187431253269).

511601616651 is a wasteful number, since it uses less digits than its factorization.

511601616651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547246.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 511601616651 in words is "five hundred eleven billion, six hundred one million, six hundred sixteen thousand, six hundred fifty-one".