63401570621543 has 32 divisors (see below), whose sum is σ = 80232350681088. Its totient is φ = 48662541813600.

The previous prime is 63401570621503. The next prime is 63401570621551. The reversal of 63401570621543 is 34512607510436.

It is not a de Polignac number, because 63401570621543 - 2⁶ = 63401570621479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63401570621503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64572896 + ... + 65547402.

It is an arithmetic number, because the mean of its divisors is an integer number (2507260958784).

Almost surely, 2^{63401570621543} is an apocalyptic number.

63401570621543 is a deficient number, since it is larger than the sum of its proper divisors (16830780059545).

63401570621543 is a wasteful number, since it uses less digits than its factorization.

63401570621543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987203.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 63401570621543 in words is "sixty-three trillion, four hundred one billion, five hundred seventy million, six hundred twenty-one thousand, five hundred forty-three".