64555450434 has 48 divisors (see below), whose sum is σ = 150364356480. Its totient is φ = 19952183520.

The previous prime is 64555450433. The next prime is 64555450457. The reversal of 64555450434 is 43405455546.

64555450434 is a `hidden beast` number, since 6 + 4 + 5 + 554 + 50 + 43 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 64555450434.

It is not an unprimeable number, because it can be changed into a prime (64555450433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1991997 + ... + 2024144.

It is an arithmetic number, because the mean of its divisors is an integer number (3132590760).

Almost surely, 2^64555450434 is an apocalyptic number.

64555450434 is an abundant number, since it is smaller than the sum of its proper divisors (85808906046).

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

64555450434 is a wasteful number, since it uses less digits than its factorization.

64555450434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016215 (or 4016212 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 45.

The spelling of 64555450434 in words is "sixty-four billion, five hundred fifty-five million, four hundred fifty thousand, four hundred thirty-four".