16534142778 has 32 divisors (see below), whose sum is σ = 35057582784. Its totient is φ = 5180648192.

The previous prime is 16534142773. The next prime is 16534142789. The reversal of 16534142778 is 87724143561.

It is not an unprimeable number, because it can be changed into a prime (16534142773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20400 + ... + 182987.

It is an arithmetic number, because the mean of its divisors is an integer number (1095549462).

Almost surely, 2^16534142778 is an apocalyptic number.

16534142778 is an abundant number, since it is smaller than the sum of its proper divisors (18523440006).

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

16534142778 is a wasteful number, since it uses less digits than its factorization.

16534142778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204206.

The product of its digits is 1128960, while the sum is 48.

The spelling of 16534142778 in words is "sixteen billion, five hundred thirty-four million, one hundred forty-two thousand, seven hundred seventy-eight".