25161771016120 has 32 divisors (see below), whose sum is σ = 56614157110800. Its totient is φ = 10064677771008.

The previous prime is 25161771016111. The next prime is 25161771016121. The reversal of 25161771016120 is 2161017716152.

It is a happy number.

It is a super-2 number, since 2×25161771016120² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25161771016121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16100311 + ... + 17593849.

Almost surely, 2^{25161771016120} is an apocalyptic number.

25161771016120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25161771016120 is an abundant number, since it is smaller than the sum of its proper divisors (31452386094680).

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

25161771016120 is a wasteful number, since it uses less digits than its factorization.

25161771016120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914727 (or 1914723 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 25161771016120 in words is "twenty-five trillion, one hundred sixty-one billion, seven hundred seventy-one million, sixteen thousand, one hundred twenty".