42878535064157 has 8 divisors (see below), whose sum is σ = 46188165888984. Its totient is φ = 39570515949888.

The previous prime is 42878535064153. The next prime is 42878535064159. The reversal of 42878535064157 is 75146053587824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1213950018436 + 41664585045721 = 1101794^2 + 6454811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42878535064157 - 2² = 42878535064153 is a prime.

It is a super-2 number, since 2×42878535064157² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42878535064093 and 42878535064102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878535064153) 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, 402872378 + ... + 402978795.

It is an arithmetic number, because the mean of its divisors is an integer number (5773520736123).

Almost surely, 2^{42878535064157} is an apocalyptic number.

It is an amenable number.

42878535064157 is a deficient number, since it is larger than the sum of its proper divisors (3309630824827).

42878535064157 is a wasteful number, since it uses less digits than its factorization.

42878535064157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805855279.

The product of its (nonzero) digits is 225792000, while the sum is 65.

The spelling of 42878535064157 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred thirty-five million, sixty-four thousand, one hundred fifty-seven".