61948944477 has 48 divisors (see below), whose sum is σ = 108774550080. Its totient is φ = 34731444384.

The previous prime is 61948944443. The next prime is 61948944493. The reversal of 61948944477 is 77444984916.

61948944477 is a `hidden beast` number, since 61 + 9 + 48 + 94 + 447 + 7 = 666.

It is not a de Polignac number, because 61948944477 - 2²² = 61944750173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61948944377) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 371623 + ... + 511860.

It is an arithmetic number, because the mean of its divisors is an integer number (2266136460).

Almost surely, 2^61948944477 is an apocalyptic number.

It is an amenable number.

61948944477 is a deficient number, since it is larger than the sum of its proper divisors (46825605603).

61948944477 is a wasteful number, since it uses less digits than its factorization.

61948944477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883559 (or 883546 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 61948944477 in words is "sixty-one billion, nine hundred forty-eight million, nine hundred forty-four thousand, four hundred seventy-seven".