263380423778 has 8 divisors (see below), whose sum is σ = 395727992940. Its totient is φ = 131471092800.

The previous prime is 263380423777. The next prime is 263380423783. The reversal of 263380423778 is 877324083362.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 232803355009 + 30577068769 = 482497^2 + 174863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (263380423771) 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, 109558043 + ... + 109560446.

Almost surely, 2^263380423778 is an apocalyptic number.

263380423778 is a deficient number, since it is larger than the sum of its proper divisors (132347569162).

263380423778 is a wasteful number, since it uses less digits than its factorization.

263380423778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219119092.

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 263380423778 in words is "two hundred sixty-three billion, three hundred eighty million, four hundred twenty-three thousand, seven hundred seventy-eight".