920577971544 has 256 divisors, whose sum is σ = 2960620830720. Its totient is φ = 231608954880.

The previous prime is 920577971503. The next prime is 920577971549. The reversal of 920577971544 is 445179775029.

920577971544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920577971549) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8370399 + ... + 8479665.

It is an arithmetic number, because the mean of its divisors is an integer number (11564925120).

Almost surely, 2^920577971544 is an apocalyptic number.

920577971544 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920577971544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480310415360).

920577971544 is an abundant number, since it is smaller than the sum of its proper divisors (2040042859176).

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

920577971544 is a wasteful number, since it uses less digits than its factorization.

920577971544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109438 (or 109434 counting only the distinct ones).

The product of its (nonzero) digits is 22226400, while the sum is 60.

The spelling of 920577971544 in words is "nine hundred twenty billion, five hundred seventy-seven million, nine hundred seventy-one thousand, five hundred forty-four".