616960531381 has 4 divisors (see below), whose sum is σ = 627417489600. Its totient is φ = 606503573164.

The previous prime is 616960531357. The next prime is 616960531393. The reversal of 616960531381 is 183135069616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 616960531381 - 2¹³ = 616960523189 is a prime.

It is a super-2 number, since 2×616960531381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616960535381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5228479021 + ... + 5228479138.

It is an arithmetic number, because the mean of its divisors is an integer number (156854372400).

Almost surely, 2^616960531381 is an apocalyptic number.

It is an amenable number.

616960531381 is a deficient number, since it is larger than the sum of its proper divisors (10456958219).

616960531381 is a wasteful number, since it uses less digits than its factorization.

616960531381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10456958218.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 616960531381 in words is "six hundred sixteen billion, nine hundred sixty million, five hundred thirty-one thousand, three hundred eighty-one".