249616615394 has 4 divisors (see below), whose sum is σ = 374424923094. Its totient is φ = 124808307696.

The previous prime is 249616615363. The next prime is 249616615439. The reversal of 249616615394 is 493516616942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493516616942 = 2 ⋅246758308471.

It can be written as a sum of positive squares in only one way, i.e., 249265540225 + 351075169 = 499265^2 + 18737^2 .

It is a super-2 number, since 2×249616615394² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62404153847 + ... + 62404153850.

Almost surely, 2^249616615394 is an apocalyptic number.

249616615394 is a deficient number, since it is larger than the sum of its proper divisors (124808307700).

249616615394 is a wasteful number, since it uses less digits than its factorization.

249616615394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124808307699.

The product of its digits is 8398080, while the sum is 56.

The spelling of 249616615394 in words is "two hundred forty-nine billion, six hundred sixteen million, six hundred fifteen thousand, three hundred ninety-four".