616400074 has 4 divisors (see below), whose sum is σ = 924600114. Its totient is φ = 308200036.

The previous prime is 616400053. The next prime is 616400077. The reversal of 616400074 is 470004616.

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., 316590849 + 299809225 = 17793^2 + 17315^2 .

It is a super-4 number, since 4×616400074⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (616400077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154100017 + ... + 154100020.

Almost surely, 2^616400074 is an apocalyptic number.

616400074 is a deficient number, since it is larger than the sum of its proper divisors (308200040).

616400074 is a wasteful number, since it uses less digits than its factorization.

616400074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308200039.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 616400074 is about 24827.4057041810. The cubic root of 616400074 is about 851.0483369649.

The spelling of 616400074 in words is "six hundred sixteen million, four hundred thousand, seventy-four".