25415220434 has 16 divisors (see below), whose sum is σ = 39079516608. Its totient is φ = 12389777232.

The previous prime is 25415220427. The next prime is 25415220461. The reversal of 25415220434 is 43402251452.

It is a super-2 number, since 2×25415220434² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25415220434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217382 + ... + 313185.

It is an arithmetic number, because the mean of its divisors is an integer number (2442469788).

Almost surely, 2^25415220434 is an apocalyptic number.

25415220434 is a deficient number, since it is larger than the sum of its proper divisors (13664296174).

25415220434 is a wasteful number, since it uses less digits than its factorization.

25415220434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531169.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 25415220434 its reverse (43402251452), we get a palindrome (68817471886).

The spelling of 25415220434 in words is "twenty-five billion, four hundred fifteen million, two hundred twenty thousand, four hundred thirty-four".