61440434345464 has 32 divisors (see below), whose sum is σ = 122430780298800. Its totient is φ = 28805661744640.

The previous prime is 61440434345429. The next prime is 61440434345467. The reversal of 61440434345464 is 46454343404416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61440434345467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839680702 + ... + 839753869.

Almost surely, 2^{61440434345464} is an apocalyptic number.

It is an amenable number.

61440434345464 is a deficient number, since it is larger than the sum of its proper divisors (60990345953336).

61440434345464 is a wasteful number, since it uses less digits than its factorization.

61440434345464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679434863 (or 1679434859 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 52.

The spelling of 61440434345464 in words is "sixty-one trillion, four hundred forty billion, four hundred thirty-four million, three hundred forty-five thousand, four hundred sixty-four".