2125145433642 has 48 divisors (see below), whose sum is σ = 5339208374976. Its totient is φ = 551985825600.

The previous prime is 2125145433637. The next prime is 2125145433643. The reversal of 2125145433642 is 2463345415212.

It is a super-2 number, since 2×2125145433642² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 2125145433594 and 2125145433603.

It is not an unprimeable number, because it can be changed into a prime (2125145433643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209080459 + ... + 209090622.

It is an arithmetic number, because the mean of its divisors is an integer number (111233507812).

Almost surely, 2^{2125145433642} is an apocalyptic number.

2125145433642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2125145433642 is an abundant number, since it is smaller than the sum of its proper divisors (3214062941334).

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

2125145433642 is a wasteful number, since it uses less digits than its factorization.

2125145433642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418171115 (or 418171104 counting only the distinct ones).

The product of its digits is 691200, while the sum is 42.

The spelling of 2125145433642 in words is "two trillion, one hundred twenty-five billion, one hundred forty-five million, four hundred thirty-three thousand, six hundred forty-two".