125551880501 has 2 divisors, whose sum is σ = 125551880502. Its totient is φ = 125551880500.

The previous prime is 125551880417. The next prime is 125551880513. The reversal of 125551880501 is 105088155521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119283199876 + 6268680625 = 345374^2 + 79175^2 .

It is an emirp because it is prime and its reverse (105088155521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125551880501 is a prime.

It is a super-2 number, since 2×125551880501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125551880551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62775940250 + 62775940251.

It is an arithmetic number, because the mean of its divisors is an integer number (62775940251).

Almost surely, 2^125551880501 is an apocalyptic number.

It is an amenable number.

125551880501 is a deficient number, since it is larger than the sum of its proper divisors (1).

125551880501 is an equidigital number, since it uses as much as digits as its factorization.

125551880501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80000, while the sum is 41.

The spelling of 125551880501 in words is "one hundred twenty-five billion, five hundred fifty-one million, eight hundred eighty thousand, five hundred one".