25701621034 has 4 divisors (see below), whose sum is σ = 38552431554. Its totient is φ = 12850810516.

The previous prime is 25701621017. The next prime is 25701621097. The reversal of 25701621034 is 43012610752.

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., 19375804809 + 6325816225 = 139197^2 + 79535^2 .

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 25701620987 and 25701621005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6425405257 + ... + 6425405260.

Almost surely, 2^25701621034 is an apocalyptic number.

25701621034 is a deficient number, since it is larger than the sum of its proper divisors (12850810520).

25701621034 is a wasteful number, since it uses less digits than its factorization.

25701621034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850810519.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 25701621034 in words is "twenty-five billion, seven hundred one million, six hundred twenty-one thousand, thirty-four".