345425672778 has 64 divisors (see below), whose sum is σ = 735478824960. Its totient is φ = 107961940800.

The previous prime is 345425672777. The next prime is 345425672951. The reversal of 345425672778 is 877276524543.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (345425672771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1539793 + ... + 1749803.

It is an arithmetic number, because the mean of its divisors is an integer number (11491856640).

Almost surely, 2^345425672778 is an apocalyptic number.

345425672778 is an abundant number, since it is smaller than the sum of its proper divisors (390053152182).

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

345425672778 is a wasteful number, since it uses less digits than its factorization.

345425672778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210323.

The product of its digits is 79027200, while the sum is 60.

The spelling of 345425672778 in words is "three hundred forty-five billion, four hundred twenty-five million, six hundred seventy-two thousand, seven hundred seventy-eight".