25727491552 has 192 divisors, whose sum is σ = 62983267200. Its totient is φ = 10304544768.

The previous prime is 25727491541. The next prime is 25727491567. The reversal of 25727491552 is 25519472752.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 25727491496 and 25727491505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32280018 + ... + 32280814.

It is an arithmetic number, because the mean of its divisors is an integer number (328037850).

Almost surely, 2^25727491552 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 25727491552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31491633600).

25727491552 is an abundant number, since it is smaller than the sum of its proper divisors (37255775648).

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

25727491552 is a wasteful number, since it uses less digits than its factorization.

25727491552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 996 counting only the distinct ones).

The product of its digits is 1764000, while the sum is 49.

The spelling of 25727491552 in words is "twenty-five billion, seven hundred twenty-seven million, four hundred ninety-one thousand, five hundred fifty-two".