125151661567 has 4 divisors (see below), whose sum is σ = 125402467000. Its totient is φ = 124900856136.

The previous prime is 125151661559. The next prime is 125151661597. The reversal of 125151661567 is 765166151521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765166151521 = 89 ⋅8597372489.

It is a cyclic number.

It is not a de Polignac number, because 125151661567 - 2³ = 125151661559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125151661597) 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, 125401968 + ... + 125402965.

It is an arithmetic number, because the mean of its divisors is an integer number (31350616750).

Almost surely, 2^125151661567 is an apocalyptic number.

125151661567 is a deficient number, since it is larger than the sum of its proper divisors (250805433).

125151661567 is an equidigital number, since it uses as much as digits as its factorization.

125151661567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250805432.

The product of its digits is 378000, while the sum is 46.

The spelling of 125151661567 in words is "one hundred twenty-five billion, one hundred fifty-one million, six hundred sixty-one thousand, five hundred sixty-seven".