654511655961 has 16 divisors (see below), whose sum is σ = 969689321920. Its totient is φ = 436322013120.

The previous prime is 654511655951. The next prime is 654511655971. The reversal of 654511655961 is 169556115456.

654511655961 is a `hidden beast` number, since 6 + 5 + 4 + 511 + 65 + 5 + 9 + 61 = 666.

654511655961 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (654511655951) and next prime (654511655971).

It is a de Polignac number, because none of the positive numbers 2^k-654511655961 is a prime.

It is a super-3 number, since 3×654511655961³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 654511655898 and 654511655907.

It is not an unprimeable number, because it can be changed into a prime (654511655951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112401 + ... + 1149633.

It is an arithmetic number, because the mean of its divisors is an integer number (60605582620).

Almost surely, 2^654511655961 is an apocalyptic number.

It is an amenable number.

654511655961 is a deficient number, since it is larger than the sum of its proper divisors (315177665959).

654511655961 is a wasteful number, since it uses less digits than its factorization.

654511655961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060613 (or 1060607 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 54.

The spelling of 654511655961 in words is "six hundred fifty-four billion, five hundred eleven million, six hundred fifty-five thousand, nine hundred sixty-one".