921377672445 has 32 divisors (see below), whose sum is σ = 1483043328000. Its totient is φ = 488459847744.

The previous prime is 921377672441. The next prime is 921377672459. The reversal of 921377672445 is 544276773129.

It is not a de Polignac number, because 921377672445 - 2² = 921377672441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921377672441) 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, 2952874 + ... + 3249956.

It is an arithmetic number, because the mean of its divisors is an integer number (46345104000).

Almost surely, 2^921377672445 is an apocalyptic number.

It is an amenable number.

921377672445 is a deficient number, since it is larger than the sum of its proper divisors (561665655555).

921377672445 is a wasteful number, since it uses less digits than its factorization.

921377672445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298329.

The product of its digits is 17781120, while the sum is 57.

The spelling of 921377672445 in words is "nine hundred twenty-one billion, three hundred seventy-seven million, six hundred seventy-two thousand, four hundred forty-five".