125640040690 has 32 divisors (see below), whose sum is σ = 229394120256. Its totient is φ = 49538299200.

The previous prime is 125640040663. The next prime is 125640040723. The reversal of 125640040690 is 96040046521.

It is a super-2 number, since 2×125640040690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196840 + ... + 538540.

It is an arithmetic number, because the mean of its divisors is an integer number (7168566258).

Almost surely, 2^125640040690 is an apocalyptic number.

125640040690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125640040690 is a deficient number, since it is larger than the sum of its proper divisors (103754079566).

125640040690 is a wasteful number, since it uses less digits than its factorization.

125640040690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342234.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 125640040690 in words is "one hundred twenty-five billion, six hundred forty million, forty thousand, six hundred ninety".