235436781238640 has 40 divisors (see below), whose sum is σ = 547427437632240. Its totient is φ = 94168360452096.

The previous prime is 235436781238639. The next prime is 235436781238669. The reversal of 235436781238640 is 46832187634532.

235436781238640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×235436781238640² (a number of 30 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 7 ways as a sum of consecutive naturals, for example, 98057105 + ... + 100429424.

It is an arithmetic number, because the mean of its divisors is an integer number (13685685940806).

Almost surely, 2^{235436781238640} is an apocalyptic number.

235436781238640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

235436781238640 is an abundant number, since it is smaller than the sum of its proper divisors (311990656393600).

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

235436781238640 is a wasteful number, since it uses less digits than its factorization.

235436781238640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198501369 (or 198501363 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 62.

The spelling of 235436781238640 in words is "two hundred thirty-five trillion, four hundred thirty-six billion, seven hundred eighty-one million, two hundred thirty-eight thousand, six hundred forty".