23435537647640 has 32 divisors (see below), whose sum is σ = 52731972589680. Its totient is φ = 9373857213312.

The previous prime is 23435537647609. The next prime is 23435537647723. The reversal of 23435537647640 is 4674673553432.

It is a self number, because there is not a number n which added to its sum of digits gives 23435537647640.

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, 10120487 + ... + 12218646.

Almost surely, 2^{23435537647640} is an apocalyptic number.

23435537647640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23435537647640 is an abundant number, since it is smaller than the sum of its proper divisors (29296434942040).

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

23435537647640 is a wasteful number, since it uses less digits than its factorization.

23435537647640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22365371 (or 22365367 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 59.

The spelling of 23435537647640 in words is "twenty-three trillion, four hundred thirty-five billion, five hundred thirty-seven million, six hundred forty-seven thousand, six hundred forty".