2153640523542 has 16 divisors (see below), whose sum is σ = 4323175076352. Its totient is φ = 715231169640.

The previous prime is 2153640523501. The next prime is 2153640523547. The reversal of 2153640523542 is 2453250463512.

It is a junction number, because it is equal to n+sod(n) for n = 2153640523494 and 2153640523503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153640523547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662249458 + ... + 662252709.

It is an arithmetic number, because the mean of its divisors is an integer number (270198442272).

Almost surely, 2^{2153640523542} is an apocalyptic number.

2153640523542 is an abundant number, since it is smaller than the sum of its proper divisors (2169534552810).

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

2153640523542 is a wasteful number, since it uses less digits than its factorization.

2153640523542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324502443.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 2153640523542 in words is "two trillion, one hundred fifty-three billion, six hundred forty million, five hundred twenty-three thousand, five hundred forty-two".