251262562641 has 4 divisors (see below), whose sum is σ = 335016750192. Its totient is φ = 167508375092.

The previous prime is 251262562571. The next prime is 251262562669. The reversal of 251262562641 is 146265262152.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 251262562641 - 2⁷ = 251262562513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251262562593 and 251262562602.

It is not an unprimeable number, because it can be changed into a prime (251262562541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41877093771 + ... + 41877093776.

It is an arithmetic number, because the mean of its divisors is an integer number (83754187548).

Almost surely, 2^251262562641 is an apocalyptic number.

It is an amenable number.

251262562641 is a deficient number, since it is larger than the sum of its proper divisors (83754187551).

251262562641 is an equidigital number, since it uses as much as digits as its factorization.

251262562641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83754187550.

The product of its digits is 345600, while the sum is 42.

The spelling of 251262562641 in words is "two hundred fifty-one billion, two hundred sixty-two million, five hundred sixty-two thousand, six hundred forty-one".