1520398043542 has 16 divisors (see below), whose sum is σ = 2606433819552. Its totient is φ = 651589868160.

The previous prime is 1520398043539. The next prime is 1520398043543. The reversal of 1520398043542 is 2453408930251.

It is a super-2 number, since 2×1520398043542² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1520398043492 and 1520398043501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520398043543) 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, 292942 + ... + 1768222.

It is an arithmetic number, because the mean of its divisors is an integer number (162902113722).

Almost surely, 2^{1520398043542} is an apocalyptic number.

1520398043542 is a deficient number, since it is larger than the sum of its proper divisors (1086035776010).

1520398043542 is a wasteful number, since it uses less digits than its factorization.

1520398043542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548903.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 1520398043542 in words is "one trillion, five hundred twenty billion, three hundred ninety-eight million, forty-three thousand, five hundred forty-two".