1542778995 has 16 divisors (see below), whose sum is σ = 2520967680. Its totient is φ = 805308384.

The previous prime is 1542778949. The next prime is 1542778997. The reversal of 1542778995 is 5998772451.

It is not a de Polignac number, because 1542778995 - 2¹⁸ = 1542516851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1542778997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1093465 + ... + 1094874.

It is an arithmetic number, because the mean of its divisors is an integer number (157560480).

Almost surely, 2^1542778995 is an apocalyptic number.

1542778995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1542778995 is a deficient number, since it is larger than the sum of its proper divisors (978188685).

1542778995 is a wasteful number, since it uses less digits than its factorization.

1542778995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188394.

The product of its digits is 6350400, while the sum is 57.

The square root of 1542778995 is about 39278.2254563518. The cubic root of 1542778995 is about 1155.4945615389.

The spelling of 1542778995 in words is "one billion, five hundred forty-two million, seven hundred seventy-eight thousand, nine hundred ninety-five".