64490806942 has 8 divisors (see below), whose sum is σ = 97901707176. Its totient is φ = 31856904552.

The previous prime is 64490806927. The next prime is 64490806957. The reversal of 64490806942 is 24960809446.

It is an interprime number because it is at equal distance from previous prime (64490806927) and next prime (64490806957).

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

It is a super-4 number, since 4×64490806942⁴ (a number of 44 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64490806942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194249253 + ... + 194249584.

It is an arithmetic number, because the mean of its divisors is an integer number (12237713397).

Almost surely, 2^64490806942 is an apocalyptic number.

64490806942 is a deficient number, since it is larger than the sum of its proper divisors (33410900234).

64490806942 is a wasteful number, since it uses less digits than its factorization.

64490806942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388498922.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 64490806942 in words is "sixty-four billion, four hundred ninety million, eight hundred six thousand, nine hundred forty-two".