511161253506 has 32 divisors (see below), whose sum is σ = 1150292563200. Its totient is φ = 168230284560.

The previous prime is 511161253441. The next prime is 511161253507. The reversal of 511161253506 is 605352161115.

511161253506 is a `hidden beast` number, since 5 + 1 + 1 + 1 + 612 + 5 + 35 + 0 + 6 = 666.

511161253506 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×511161253506² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511161253507) 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, 59906805 + ... + 59915336.

It is an arithmetic number, because the mean of its divisors is an integer number (35946642600).

Almost surely, 2^511161253506 is an apocalyptic number.

511161253506 is an abundant number, since it is smaller than the sum of its proper divisors (639131309694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511161253506 is a wasteful number, since it uses less digits than its factorization.

511161253506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119822231 (or 119822225 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 511161253506 in words is "five hundred eleven billion, one hundred sixty-one million, two hundred fifty-three thousand, five hundred six".