64101690 has 96 divisors (see below), whose sum is σ = 175893120. Its totient is φ = 16165248.

The previous prime is 64101689. The next prime is 64101731. The reversal of 64101690 is 9610146.

64101690 is a `hidden beast` number, since 641 + 0 + 16 + 9 + 0 = 666.

It is a super-2 number, since 2×64101690² = 8218053321712200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 358021 + ... + 358199.

It is an arithmetic number, because the mean of its divisors is an integer number (1832220).

Almost surely, 2^64101690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64101690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87946560).

64101690 is an abundant number, since it is smaller than the sum of its proper divisors (111791430).

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

64101690 is a wasteful number, since it uses less digits than its factorization.

64101690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 64101690 is about 8006.3531023806. The cubic root of 64101690 is about 400.2117420601.

It can be divided in two parts, 6410 and 1690, that added together give a square (8100 = 90²).

The spelling of 64101690 in words is "sixty-four million, one hundred one thousand, six hundred ninety".