42515551406040 has 256 divisors, whose sum is σ = 138816051696000. Its totient is φ = 10390906552320.

The previous prime is 42515551406017. The next prime is 42515551406057. The reversal of 42515551406040 is 4060415551524.

It is a happy number.

It is a super-2 number, since 2×42515551406040² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42515551405983 and 42515551406001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1252426 + ... + 9305894.

Almost surely, 2^{42515551406040} is an apocalyptic number.

42515551406040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42515551406040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69408025848000).

42515551406040 is an abundant number, since it is smaller than the sum of its proper divisors (96300500289960).

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

42515551406040 is a wasteful number, since it uses less digits than its factorization.

42515551406040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053590 (or 8053586 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 42.

Adding to 42515551406040 its reverse (4060415551524), we get a palindrome (46575966957564).

The spelling of 42515551406040 in words is "forty-two trillion, five hundred fifteen billion, five hundred fifty-one million, four hundred six thousand, forty".