25021154451 has 16 divisors (see below), whose sum is σ = 33417976320. Its totient is φ = 16652578560.

The previous prime is 25021154447. The next prime is 25021154461. The reversal of 25021154451 is 15445112052.

It is not a de Polignac number, because 25021154451 - 2² = 25021154447 is a prime.

It is a super-2 number, since 2×25021154451² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25021154461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7028610 + ... + 7032168.

It is an arithmetic number, because the mean of its divisors is an integer number (2088623520).

Almost surely, 2^25021154451 is an apocalyptic number.

25021154451 is a deficient number, since it is larger than the sum of its proper divisors (8396821869).

25021154451 is a wasteful number, since it uses less digits than its factorization.

25021154451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6866.

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 25021154451 in words is "twenty-five billion, twenty-one million, one hundred fifty-four thousand, four hundred fifty-one".