623002394978 has 4 divisors (see below), whose sum is σ = 934503592470. Its totient is φ = 311501197488.

The previous prime is 623002394977. The next prime is 623002395007. The reversal of 623002394978 is 879493200326.

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

It can be written as a sum of positive squares in only one way, i.e., 599783644849 + 23218750129 = 774457^2 + 152377^2 .

It is not an unprimeable number, because it can be changed into a prime (623002394977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155750598743 + ... + 155750598746.

Almost surely, 2^623002394978 is an apocalyptic number.

623002394978 is a deficient number, since it is larger than the sum of its proper divisors (311501197492).

623002394978 is a wasteful number, since it uses less digits than its factorization.

623002394978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311501197491.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 623002394978 in words is "six hundred twenty-three billion, two million, three hundred ninety-four thousand, nine hundred seventy-eight".