1401637000643 has 32 divisors (see below), whose sum is σ = 1588257504000. Its totient is φ = 1225247587200.

The previous prime is 1401637000639. The next prime is 1401637000691. The reversal of 1401637000643 is 3460007361041.

It is not a de Polignac number, because 1401637000643 - 2² = 1401637000639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401637000633) 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, 230113028 + ... + 230119118.

It is an arithmetic number, because the mean of its divisors is an integer number (49633047000).

Almost surely, 2^{1401637000643} is an apocalyptic number.

1401637000643 is a deficient number, since it is larger than the sum of its proper divisors (186620503357).

1401637000643 is a wasteful number, since it uses less digits than its factorization.

1401637000643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 1401637000643 in words is "one trillion, four hundred one billion, six hundred thirty-seven million, six hundred forty-three", and thus it is an aban number.