61901773488687 has 64 divisors (see below), whose sum is σ = 93915965030400. Its totient is φ = 35922487466880.

The previous prime is 61901773488671. The next prime is 61901773488733. The reversal of 61901773488687 is 78688437710916.

It is not a de Polignac number, because 61901773488687 - 2⁴ = 61901773488671 is a prime.

It is a super-2 number, since 2×61901773488687² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61901773488487) 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 63 ways as a sum of consecutive naturals, for example, 297301864 + ... + 297510002.

It is an arithmetic number, because the mean of its divisors is an integer number (1467436953600).

Almost surely, 2^{61901773488687} is an apocalyptic number.

61901773488687 is a deficient number, since it is larger than the sum of its proper divisors (32014191541713).

61901773488687 is a wasteful number, since it uses less digits than its factorization.

61901773488687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210756.

The product of its (nonzero) digits is 682795008, while the sum is 75.

The spelling of 61901773488687 in words is "sixty-one trillion, nine hundred one billion, seven hundred seventy-three million, four hundred eighty-eight thousand, six hundred eighty-seven".