64506036390 has 16 divisors (see below), whose sum is σ = 154814487408. Its totient is φ = 17201609696.

The previous prime is 64506036341. The next prime is 64506036403. The reversal of 64506036390 is 9363060546.

It is a super-2 number, since 2×64506036390² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075100577 + ... + 1075100636.

It is an arithmetic number, because the mean of its divisors is an integer number (9675905463).

Almost surely, 2^64506036390 is an apocalyptic number.

64506036390 is an abundant number, since it is smaller than the sum of its proper divisors (90308451018).

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

64506036390 is a wasteful number, since it uses less digits than its factorization.

64506036390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150201223.

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 64506036390 in words is "sixty-four billion, five hundred six million, thirty-six thousand, three hundred ninety".