625778078 has 4 divisors (see below), whose sum is σ = 938667120. Its totient is φ = 312889038.

The previous prime is 625778071. The next prime is 625778081. The reversal of 625778078 is 870877526.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625778071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156444518 + ... + 156444521.

It is an arithmetic number, because the mean of its divisors is an integer number (234666780).

Almost surely, 2^625778078 is an apocalyptic number.

625778078 is a deficient number, since it is larger than the sum of its proper divisors (312889042).

625778078 is a wasteful number, since it uses less digits than its factorization.

625778078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312889041.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The square root of 625778078 is about 25015.5567197694. The cubic root of 625778078 is about 855.3426247848.

The spelling of 625778078 in words is "six hundred twenty-five million, seven hundred seventy-eight thousand, seventy-eight".