511161253542 has 48 divisors (see below), whose sum is σ = 1111869487872. Its totient is φ = 169718356080.

The previous prime is 511161253531. The next prime is 511161253583. The reversal of 511161253542 is 245352161115.

511161253542 is a `hidden beast` number, since 5 + 1 + 1 + 1 + 61 + 2 + 53 + 542 = 666.

It is a super-2 number, since 2×511161253542² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 511161253497 and 511161253506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5997567 + ... + 6082197.

It is an arithmetic number, because the mean of its divisors is an integer number (23163947664).

Almost surely, 2^511161253542 is an apocalyptic number.

511161253542 is an abundant number, since it is smaller than the sum of its proper divisors (600708234330).

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

511161253542 is a wasteful number, since it uses less digits than its factorization.

511161253542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85953 (or 85950 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The spelling of 511161253542 in words is "five hundred eleven billion, one hundred sixty-one million, two hundred fifty-three thousand, five hundred forty-two".