25397758697472 has 1568 divisors, whose sum is σ = 90765070387200. Its totient is φ = 6952804024320.

The previous prime is 25397758697471. The next prime is 25397758697567. The reversal of 25397758697472 is 27479685779352.

25397758697472 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 7 + 7 + 58 + 6 + 97 + 472 = 666.

It is a super-2 number, since 2×25397758697472² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 25397758697391 and 25397758697400.

It is not an unprimeable number, because it can be changed into a prime (25397758697471) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 127626928029 + ... + 127626928227.

Almost surely, 2^{25397758697472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25397758697472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45382535193600).

25397758697472 is an abundant number, since it is smaller than the sum of its proper divisors (65367311689728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25397758697472 is an frugal number, since it uses more digits than its factorization.

25397758697472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 325 counting only the distinct ones).

The product of its digits is 11202105600, while the sum is 81.

The spelling of 25397758697472 in words is "twenty-five trillion, three hundred ninety-seven billion, seven hundred fifty-eight million, six hundred ninety-seven thousand, four hundred seventy-two".