511520436138 has 16 divisors (see below), whose sum is σ = 1023330974400. Its totient is φ = 170458461696.

The previous prime is 511520436137. The next prime is 511520436173. The reversal of 511520436138 is 831634025115.

It is a junction number, because it is equal to n+sod(n) for n = 511520436096 and 511520436105.

It is not an unprimeable number, because it can be changed into a prime (511520436131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12064663 + ... + 12106986.

It is an arithmetic number, because the mean of its divisors is an integer number (63958185900).

Almost surely, 2^511520436138 is an apocalyptic number.

511520436138 is an abundant number, since it is smaller than the sum of its proper divisors (511810538262).

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

511520436138 is a wasteful number, since it uses less digits than its factorization.

511520436138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24175181.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 511520436138 in words is "five hundred eleven billion, five hundred twenty million, four hundred thirty-six thousand, one hundred thirty-eight".