511020161001 has 96 divisors (see below), whose sum is σ = 866611200000. Its totient is φ = 284121509760.

The previous prime is 511020160991. The next prime is 511020161053. The reversal of 511020161001 is 100161020115.

It is a happy number.

511020161001 is a `hidden beast` number, since 51 + 1 + 0 + 2 + 0 + 1 + 610 + 0 + 1 = 666.

It is not a de Polignac number, because 511020161001 - 2⁷ = 511020160873 is a prime.

It is a super-2 number, since 2×511020161001² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511020163001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 515660616 + ... + 515661606.

It is an arithmetic number, because the mean of its divisors is an integer number (9027200000).

Almost surely, 2^511020161001 is an apocalyptic number.

It is an amenable number.

511020161001 is a deficient number, since it is larger than the sum of its proper divisors (355591038999).

511020161001 is a wasteful number, since it uses less digits than its factorization.

511020161001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899 (or 1896 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 511020161001 its reverse (100161020115), we get a palindrome (611181181116).

The spelling of 511020161001 in words is "five hundred eleven billion, twenty million, one hundred sixty-one thousand, one".