611564431512 has 64 divisors (see below), whose sum is σ = 1556626993920. Its totient is φ = 200178557568.

The previous prime is 611564431463. The next prime is 611564431571. The reversal of 611564431512 is 215134465116.

It is a super-2 number, since 2×611564431512² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90148 + ... + 1109619.

It is an arithmetic number, because the mean of its divisors is an integer number (24322296780).

Almost surely, 2^611564431512 is an apocalyptic number.

It is an amenable number.

611564431512 is an abundant number, since it is smaller than the sum of its proper divisors (945062562408).

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

611564431512 is a wasteful number, since it uses less digits than its factorization.

611564431512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200160 (or 1200156 counting only the distinct ones).

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

Adding to 611564431512 its reverse (215134465116), we get a palindrome (826698896628).

The spelling of 611564431512 in words is "six hundred eleven billion, five hundred sixty-four million, four hundred thirty-one thousand, five hundred twelve".