42447178631 has 16 divisors (see below), whose sum is σ = 50260697088. Its totient is φ = 35339522400.

The previous prime is 42447178601. The next prime is 42447178651. The reversal of 42447178631 is 13687174424.

It is not a de Polignac number, because 42447178631 - 2¹⁰ = 42447177607 is a prime.

It is a super-2 number, since 2×42447178631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42447178601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150475 + ... + 1186796.

It is an arithmetic number, because the mean of its divisors is an integer number (3141293568).

Almost surely, 2^42447178631 is an apocalyptic number.

42447178631 is a deficient number, since it is larger than the sum of its proper divisors (7813518457).

42447178631 is a wasteful number, since it uses less digits than its factorization.

42447178631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337422.

The product of its digits is 903168, while the sum is 47.

The spelling of 42447178631 in words is "forty-two billion, four hundred forty-seven million, one hundred seventy-eight thousand, six hundred thirty-one".