25219621970 has 16 divisors (see below), whose sum is σ = 45398392920. Its totient is φ = 10087165824.

The previous prime is 25219621949. The next prime is 25219621979. The reversal of 25219621970 is 7912691252.

It can be written as a sum of positive squares in 4 ways, for example, as 10984507249 + 14235114721 = 104807^2 + 119311^2 .

It is not an unprimeable number, because it can be changed into a prime (25219621979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86126 + ... + 240534.

Almost surely, 2^25219621970 is an apocalyptic number.

25219621970 is a deficient number, since it is larger than the sum of its proper divisors (20178770950).

25219621970 is a wasteful number, since it uses less digits than its factorization.

25219621970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170749.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 25219621970 in words is "twenty-five billion, two hundred nineteen million, six hundred twenty-one thousand, nine hundred seventy".