61220548623 has 24 divisors (see below), whose sum is σ = 90057195792. Its totient is φ = 36963333888.

The previous prime is 61220548621. The next prime is 61220548663. The reversal of 61220548623 is 32684502216.

It is not a de Polignac number, because 61220548623 - 2¹ = 61220548621 is a prime.

It is a super-2 number, since 2×61220548623² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61220548621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1112286 + ... + 1166027.

It is an arithmetic number, because the mean of its divisors is an integer number (3752383158).

Almost surely, 2^61220548623 is an apocalyptic number.

61220548623 is a deficient number, since it is larger than the sum of its proper divisors (28836647169).

61220548623 is a wasteful number, since it uses less digits than its factorization.

61220548623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278395 (or 2278382 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 61220548623 in words is "sixty-one billion, two hundred twenty million, five hundred forty-eight thousand, six hundred twenty-three".