61223437536 has 48 divisors (see below), whose sum is σ = 160734720384. Its totient is φ = 20404866944.

The previous prime is 61223437531. The next prime is 61223437567. The reversal of 61223437536 is 63573432216.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61223437531) 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, 682261 + ... + 766763.

It is an arithmetic number, because the mean of its divisors is an integer number (3348640008).

Almost surely, 2^61223437536 is an apocalyptic number.

It is an amenable number.

61223437536 is an abundant number, since it is smaller than the sum of its proper divisors (99511282848).

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

61223437536 is a wasteful number, since it uses less digits than its factorization.

61223437536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92063 (or 92055 counting only the distinct ones).

The product of its digits is 544320, while the sum is 42.

The spelling of 61223437536 in words is "sixty-one billion, two hundred twenty-three million, four hundred thirty-seven thousand, five hundred thirty-six".