305512051040 has 384 divisors, whose sum is σ = 899140435200. Its totient is φ = 95704842240.

The previous prime is 305512051007. The next prime is 305512051051. The reversal of 305512051040 is 40150215503.

It is a super-2 number, since 2×305512051040² (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 63 ways as a sum of consecutive naturals, for example, 178765706 + ... + 178767414.

It is an arithmetic number, because the mean of its divisors is an integer number (2341511550).

Almost surely, 2^305512051040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305512051040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449570217600).

305512051040 is an abundant number, since it is smaller than the sum of its proper divisors (593628384160).

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

305512051040 is a wasteful number, since it uses less digits than its factorization.

305512051040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018 (or 2010 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 305512051040 its reverse (40150215503), we get a palindrome (345662266543).

The spelling of 305512051040 in words is "three hundred five billion, five hundred twelve million, fifty-one thousand, forty".