381137904485 has 32 divisors (see below), whose sum is σ = 498232516320. Its totient is φ = 278208995328.

The previous prime is 381137904479. The next prime is 381137904541. The reversal of 381137904485 is 584409731183.

It can be written as a sum of positive squares in 16 ways, for example, as 96944426881 + 284193477604 = 311359^2 + 533098^2 .

It is a cyclic number.

It is not a de Polignac number, because 381137904485 - 2¹² = 381137900389 is a prime.

It is a super-2 number, since 2×381137904485² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24156059 + ... + 24171831.

It is an arithmetic number, because the mean of its divisors is an integer number (15569766135).

Almost surely, 2^381137904485 is an apocalyptic number.

It is an amenable number.

381137904485 is a deficient number, since it is larger than the sum of its proper divisors (117094611835).

381137904485 is a wasteful number, since it uses less digits than its factorization.

381137904485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20057.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 381137904485 in words is "three hundred eighty-one billion, one hundred thirty-seven million, nine hundred four thousand, four hundred eighty-five".