1601318077278 has 16 divisors (see below), whose sum is σ = 3202896657936. Its totient is φ = 533729275200.

The previous prime is 1601318077273. The next prime is 1601318077309. The reversal of 1601318077278 is 8727708131061.

It is a self number, because there is not a number n which added to its sum of digits gives 1601318077278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601318077273) 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, 10774351 + ... + 10921962.

It is an arithmetic number, because the mean of its divisors is an integer number (200181041121).

Almost surely, 2^{1601318077278} is an apocalyptic number.

1601318077278 is an abundant number, since it is smaller than the sum of its proper divisors (1601578580658).

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

1601318077278 is a wasteful number, since it uses less digits than its factorization.

1601318077278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21708619.

The product of its (nonzero) digits is 790272, while the sum is 51.

The spelling of 1601318077278 in words is "one trillion, six hundred one billion, three hundred eighteen million, seventy-seven thousand, two hundred seventy-eight".