346777778140 has 48 divisors (see below), whose sum is σ = 764465909760. Its totient is φ = 131961349440.

The previous prime is 346777778129. The next prime is 346777778141. The reversal of 346777778140 is 41877777643.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346777778141) 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, 4703412 + ... + 4776571.

It is an arithmetic number, because the mean of its divisors is an integer number (15926373120).

Almost surely, 2^346777778140 is an apocalyptic number.

It is an amenable number.

346777778140 is an abundant number, since it is smaller than the sum of its proper divisors (417688131620).

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

346777778140 is a wasteful number, since it uses less digits than its factorization.

346777778140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9480082 (or 9480080 counting only the distinct ones).

The product of its (nonzero) digits is 38723328, while the sum is 61.

The spelling of 346777778140 in words is "three hundred forty-six billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, one hundred forty".