42691463694 has 192 divisors, whose sum is σ = 106109740800. Its totient is φ = 12712011840.

The previous prime is 42691463693. The next prime is 42691463699. The reversal of 42691463694 is 49636419624.

42691463694 is a `hidden beast` number, since 4 + 2 + 6 + 91 + 463 + 6 + 94 = 666.

It is a super-2 number, since 2×42691463694² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42691463694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42691463693) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 158704192 + ... + 158704460.

It is an arithmetic number, because the mean of its divisors is an integer number (552654900).

Almost surely, 2^42691463694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42691463694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53054870400).

42691463694 is an abundant number, since it is smaller than the sum of its proper divisors (63418277106).

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

42691463694 is a wasteful number, since it uses less digits than its factorization.

42691463694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 619 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The spelling of 42691463694 in words is "forty-two billion, six hundred ninety-one million, four hundred sixty-three thousand, six hundred ninety-four".