64771942 has 16 divisors (see below), whose sum is σ = 99316800. Its totient is φ = 31674240.

The previous prime is 64771937. The next prime is 64771943. The reversal of 64771942 is 24917746.

It is a junction number, because it is equal to n+sod(n) for n = 64771895 and 64771904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64771943) 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, 15342 + ... + 19102.

It is an arithmetic number, because the mean of its divisors is an integer number (6207300).

Almost surely, 2^64771942 is an apocalyptic number.

64771942 is a deficient number, since it is larger than the sum of its proper divisors (34544858).

64771942 is a wasteful number, since it uses less digits than its factorization.

64771942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951.

The product of its digits is 84672, while the sum is 40.

The square root of 64771942 is about 8048.1017637701. The cubic root of 64771942 is about 401.6017896131.

The spelling of 64771942 in words is "sixty-four million, seven hundred seventy-one thousand, nine hundred forty-two".