61226261564 has 48 divisors (see below), whose sum is σ = 119175331968. Its totient is φ = 27343044288.

The previous prime is 61226261563. The next prime is 61226261567. The reversal of 61226261564 is 46516262216.

61226261564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61226261563) 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, 111299 + ... + 367205.

It is an arithmetic number, because the mean of its divisors is an integer number (2482819416).

Almost surely, 2^61226261564 is an apocalyptic number.

It is an amenable number.

61226261564 is a deficient number, since it is larger than the sum of its proper divisors (57949070404).

61226261564 is a wasteful number, since it uses less digits than its factorization.

61226261564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256074 (or 256072 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The spelling of 61226261564 in words is "sixty-one billion, two hundred twenty-six million, two hundred sixty-one thousand, five hundred sixty-four".