511091616 has 48 divisors (see below), whose sum is σ = 1533276864. Its totient is φ = 146025984.

The previous prime is 511091597. The next prime is 511091629. The reversal of 511091616 is 616190115.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×511091616² = 522429279890982912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379605 + ... + 380948.

It is an arithmetic number, because the mean of its divisors is an integer number (31943268).

Almost surely, 2^511091616 is an apocalyptic number.

511091616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

511091616 is an abundant number, since it is smaller than the sum of its proper divisors (1022185248).

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

511091616 is a wasteful number, since it uses less digits than its factorization.

511091616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760573 (or 760565 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 511091616 is about 22607.3354467084. The cubic root of 511091616 is about 799.5266032580.

It can be divided in two parts, 51109 and 1616, that added together give a palindrome (52725).

The spelling of 511091616 in words is "five hundred eleven million, ninety-one thousand, six hundred sixteen".