64354671620 has 48 divisors (see below), whose sum is σ = 142979981760. Its totient is φ = 24263213184.

The previous prime is 64354671607. The next prime is 64354671649. The reversal of 64354671620 is 2617645346.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354974 + ... + 504693.

It is an arithmetic number, because the mean of its divisors is an integer number (2978749620).

Almost surely, 2^64354671620 is an apocalyptic number.

It is an amenable number.

64354671620 is an abundant number, since it is smaller than the sum of its proper divisors (78625310140).

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

64354671620 is a wasteful number, since it uses less digits than its factorization.

64354671620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859892 (or 859890 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 64354671620 in words is "sixty-four billion, three hundred fifty-four million, six hundred seventy-one thousand, six hundred twenty".