641563154737400 has 96 divisors (see below), whose sum is σ = 1805002892555040. Its totient is φ = 207025421352960.

The previous prime is 641563154737369. The next prime is 641563154737411. The reversal of 641563154737400 is 4737451365146.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13478193737 + ... + 13478241336.

It is an arithmetic number, because the mean of its divisors is an integer number (18802113464115).

Almost surely, 2^{641563154737400} is an apocalyptic number.

It is an amenable number.

641563154737400 is an abundant number, since it is smaller than the sum of its proper divisors (1163439737817640).

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

641563154737400 is a wasteful number, since it uses less digits than its factorization.

641563154737400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26956435113 (or 26956435104 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 56.

The spelling of 641563154737400 in words is "six hundred forty-one trillion, five hundred sixty-three billion, one hundred fifty-four million, seven hundred thirty-seven thousand, four hundred".