2161052371542 has 16 divisors (see below), whose sum is σ = 4325252687280. Its totient is φ = 719826133152.

The previous prime is 2161052371537. The next prime is 2161052371547. The reversal of 2161052371542 is 2451732501612.

It is an interprime number because it is at equal distance from previous prime (2161052371537) and next prime (2161052371547).

It is a super-2 number, since 2×2161052371542² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2161052371542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161052371547) 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, 131155417 + ... + 131171892.

It is an arithmetic number, because the mean of its divisors is an integer number (270328292955).

Almost surely, 2^{2161052371542} is an apocalyptic number.

2161052371542 is an abundant number, since it is smaller than the sum of its proper divisors (2164200315738).

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

2161052371542 is a wasteful number, since it uses less digits than its factorization.

2161052371542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262328687.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 2161052371542 in words is "two trillion, one hundred sixty-one billion, fifty-two million, three hundred seventy-one thousand, five hundred forty-two".