125401643216 has 40 divisors (see below), whose sum is σ = 257308296840. Its totient is φ = 59000950784.

The previous prime is 125401643137. The next prime is 125401643281. The reversal of 125401643216 is 612346104521.

It can be written as a sum of positive squares in 4 ways, for example, as 7892545600 + 117509097616 = 88840^2 + 342796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1430870 + ... + 1515978.

It is an arithmetic number, because the mean of its divisors is an integer number (6432707421).

Almost surely, 2^125401643216 is an apocalyptic number.

125401643216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

125401643216 is an abundant number, since it is smaller than the sum of its proper divisors (131906653624).

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

125401643216 is a wasteful number, since it uses less digits than its factorization.

125401643216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90551 (or 90545 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 125401643216 its reverse (612346104521), we get a palindrome (737747747737).

The spelling of 125401643216 in words is "one hundred twenty-five billion, four hundred one million, six hundred forty-three thousand, two hundred sixteen".