643432150061610 has 64 divisors (see below), whose sum is σ = 1900599581728512. Its totient is φ = 135757112979456.

The previous prime is 643432150061587. The next prime is 643432150061627. The reversal of 643432150061610 is 16160051234346.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117844713399 + ... + 117844718858.

It is an arithmetic number, because the mean of its divisors is an integer number (29696868464508).

Almost surely, 2^{643432150061610} is an apocalyptic number.

643432150061610 is an abundant number, since it is smaller than the sum of its proper divisors (1257167431666902).

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

643432150061610 is a wasteful number, since it uses less digits than its factorization.

643432150061610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235689432287.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 643432150061610 in words is "six hundred forty-three trillion, four hundred thirty-two billion, one hundred fifty million, sixty-one thousand, six hundred ten".