654661431512 has 32 divisors (see below), whose sum is σ = 1339369074000. Its totient is φ = 297509184000.

The previous prime is 654661431503. The next prime is 654661431521. The reversal of 654661431512 is 215134166456.

It is an interprime number because it is at equal distance from previous prime (654661431503) and next prime (654661431521).

It is a super-2 number, since 2×654661431512² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390989 + ... + 1209212.

Almost surely, 2^654661431512 is an apocalyptic number.

It is an amenable number.

654661431512 is an abundant number, since it is smaller than the sum of its proper divisors (684707642488).

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

654661431512 is a wasteful number, since it uses less digits than its factorization.

654661431512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604867 (or 1604863 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

Adding to 654661431512 its reverse (215134166456), we get a palindrome (869795597968).

The spelling of 654661431512 in words is "six hundred fifty-four billion, six hundred sixty-one million, four hundred thirty-one thousand, five hundred twelve".