61425126212440 has 32 divisors (see below), whose sum is σ = 138210201676080. Its totient is φ = 24569398449792.

The previous prime is 61425126212423. The next prime is 61425126212447. The reversal of 61425126212440 is 4421262152416.

It is a super-2 number, since 2×61425126212440² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 61425126212393 and 61425126212402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61425126212447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18848562 + ... + 21865921.

Almost surely, 2^{61425126212440} is an apocalyptic number.

It is an amenable number.

61425126212440 is an abundant number, since it is smaller than the sum of its proper divisors (76785075463640).

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

61425126212440 is a wasteful number, since it uses less digits than its factorization.

61425126212440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40752211 (or 40752207 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

Adding to 61425126212440 its reverse (4421262152416), we get a palindrome (65846388364856).

The spelling of 61425126212440 in words is "sixty-one trillion, four hundred twenty-five billion, one hundred twenty-six million, two hundred twelve thousand, four hundred forty".