1542735720881 has 4 divisors (see below), whose sum is σ = 1549531913712. Its totient is φ = 1535939528052.

The previous prime is 1542735720871. The next prime is 1542735720907. The reversal of 1542735720881 is 1880275372451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1542735720881 - 2²² = 1542731526577 is a prime.

It is a super-2 number, since 2×1542735720881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542735720871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3398096075 + ... + 3398096528.

It is an arithmetic number, because the mean of its divisors is an integer number (387382978428).

Almost surely, 2^{1542735720881} is an apocalyptic number.

It is an amenable number.

1542735720881 is a deficient number, since it is larger than the sum of its proper divisors (6796192831).

1542735720881 is an equidigital number, since it uses as much as digits as its factorization.

1542735720881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6796192830.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 1542735720881 in words is "one trillion, five hundred forty-two billion, seven hundred thirty-five million, seven hundred twenty thousand, eight hundred eighty-one".