1253522515542 has 16 divisors (see below), whose sum is σ = 2734958215872. Its totient is φ = 379855307720.

The previous prime is 1253522515463. The next prime is 1253522515577. The reversal of 1253522515542 is 2455152253521.

It is a junction number, because it is equal to n+sod(n) for n = 1253522515494 and 1253522515503.

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, 9496382628 + ... + 9496382759.

It is an arithmetic number, because the mean of its divisors is an integer number (170934888492).

Almost surely, 2^{1253522515542} is an apocalyptic number.

1253522515542 is an abundant number, since it is smaller than the sum of its proper divisors (1481435700330).

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

1253522515542 is a wasteful number, since it uses less digits than its factorization.

1253522515542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18992765403.

The product of its digits is 600000, while the sum is 42.

The spelling of 1253522515542 in words is "one trillion, two hundred fifty-three billion, five hundred twenty-two million, five hundred fifteen thousand, five hundred forty-two".