125761782531 has 64 divisors (see below), whose sum is σ = 214051368960. Its totient is φ = 63772410240.

The previous prime is 125761782499. The next prime is 125761782563. The reversal of 125761782531 is 135287167521.

It is an interprime number because it is at equal distance from previous prime (125761782499) and next prime (125761782563).

It is not a de Polignac number, because 125761782531 - 2⁵ = 125761782499 is a prime.

It is a super-2 number, since 2×125761782531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125761782571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23230581 + ... + 23235993.

It is an arithmetic number, because the mean of its divisors is an integer number (3344552640).

Almost surely, 2^125761782531 is an apocalyptic number.

125761782531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125761782531 is a deficient number, since it is larger than the sum of its proper divisors (88289586429).

125761782531 is a wasteful number, since it uses less digits than its factorization.

125761782531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816.

The product of its digits is 705600, while the sum is 48.

The spelling of 125761782531 in words is "one hundred twenty-five billion, seven hundred sixty-one million, seven hundred eighty-two thousand, five hundred thirty-one".