25251321562 has 4 divisors (see below), whose sum is σ = 37876982346. Its totient is φ = 12625660780.

The previous prime is 25251321539. The next prime is 25251321577. The reversal of 25251321562 is 26512315252.

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., 15299463481 + 9951858081 = 123691^2 + 99759^2 .

It is a super-2 number, since 2×25251321562² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6312830389 + ... + 6312830392.

Almost surely, 2^25251321562 is an apocalyptic number.

25251321562 is a deficient number, since it is larger than the sum of its proper divisors (12625660784).

25251321562 is a wasteful number, since it uses less digits than its factorization.

25251321562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12625660783.

The product of its digits is 36000, while the sum is 34.

The spelling of 25251321562 in words is "twenty-five billion, two hundred fifty-one million, three hundred twenty-one thousand, five hundred sixty-two".