1542820077385 has 16 divisors (see below), whose sum is σ = 1896596810640. Its totient is φ = 1204116060160.

The previous prime is 1542820077313. The next prime is 1542820077391. The reversal of 1542820077385 is 5837700282451.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 51041201929 + 1491778875456 = 225923^2 + 1221384^2 .

It is not a de Polignac number, because 1542820077385 - 2¹⁵ = 1542820044617 is a prime.

It is a super-3 number, since 3×1542820077385³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8215599 + ... + 8401291.

It is an arithmetic number, because the mean of its divisors is an integer number (118537300665).

Almost surely, 2^{1542820077385} is an apocalyptic number.

It is an amenable number.

1542820077385 is a deficient number, since it is larger than the sum of its proper divisors (353776733255).

1542820077385 is a wasteful number, since it uses less digits than its factorization.

1542820077385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226268.

The product of its (nonzero) digits is 3763200, while the sum is 52.

The spelling of 1542820077385 in words is "one trillion, five hundred forty-two billion, eight hundred twenty million, seventy-seven thousand, three hundred eighty-five".