42155124240 has 80 divisors (see below), whose sum is σ = 131241921408. Its totient is φ = 11193105408.

The previous prime is 42155124233. The next prime is 42155124257. The reversal of 42155124240 is 4242155124.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42155124198 and 42155124207.

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, 321004 + ... + 432843.

Almost surely, 2^42155124240 is an apocalyptic number.

42155124240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42155124240 is an abundant number, since it is smaller than the sum of its proper divisors (89086797168).

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

42155124240 is a wasteful number, since it uses less digits than its factorization.

42155124240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754096 (or 754090 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 42155124240 its reverse (4242155124), we get a palindrome (46397279364).

The spelling of 42155124240 in words is "forty-two billion, one hundred fifty-five million, one hundred twenty-four thousand, two hundred forty".