1525138752642 has 64 divisors (see below), whose sum is σ = 3169367647488. Its totient is φ = 488888960000.

The previous prime is 1525138752623. The next prime is 1525138752661. The reversal of 1525138752642 is 2462578315251.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1525138752623) and next prime (1525138752661).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143862142 + ... + 143872742.

It is an arithmetic number, because the mean of its divisors is an integer number (49521369492).

Almost surely, 2^{1525138752642} is an apocalyptic number.

1525138752642 is an abundant number, since it is smaller than the sum of its proper divisors (1644228894846).

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

1525138752642 is a wasteful number, since it uses less digits than its factorization.

1525138752642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18955.

The product of its digits is 4032000, while the sum is 51.

The spelling of 1525138752642 in words is "one trillion, five hundred twenty-five billion, one hundred thirty-eight million, seven hundred fifty-two thousand, six hundred forty-two".