125261267640 has 64 divisors (see below), whose sum is σ = 375827364000. Its totient is φ = 33399132672.

The previous prime is 125261267639. The next prime is 125261267641. The reversal of 125261267640 is 46762162521.

It is an interprime number because it is at equal distance from previous prime (125261267639) and next prime (125261267641).

It is a super-2 number, since 2×125261267640² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125261267592 and 125261267601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125261267641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066054 + ... + 1177706.

Almost surely, 2^125261267640 is an apocalyptic number.

125261267640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125261267640 is an abundant number, since it is smaller than the sum of its proper divisors (250566096360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125261267640 is a wasteful number, since it uses less digits than its factorization.

125261267640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121016 (or 121012 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 125261267640 in words is "one hundred twenty-five billion, two hundred sixty-one million, two hundred sixty-seven thousand, six hundred forty".