25721763262420 has 48 divisors (see below), whose sum is σ = 54071317198080. Its totient is φ = 10278113440896.

The previous prime is 25721763262417. The next prime is 25721763262457. The reversal of 25721763262420 is 2426236712752.

It is a super-3 number, since 3×25721763262420³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404824974 + ... + 404888506.

It is an arithmetic number, because the mean of its divisors is an integer number (1126485774960).

Almost surely, 2^{25721763262420} is an apocalyptic number.

25721763262420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25721763262420 is an abundant number, since it is smaller than the sum of its proper divisors (28349553935660).

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

25721763262420 is a wasteful number, since it uses less digits than its factorization.

25721763262420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84064 (or 84062 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 25721763262420 in words is "twenty-five trillion, seven hundred twenty-one billion, seven hundred sixty-three million, two hundred sixty-two thousand, four hundred twenty".