61640716255454 has 32 divisors (see below), whose sum is σ = 106326507119616. Its totient is φ = 26253344162880.

The previous prime is 61640716255361. The next prime is 61640716255501. The reversal of 61640716255454 is 45455261704616.

It is a super-2 number, since 2×61640716255454² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61640716255454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7414727 + ... + 13351389.

It is an arithmetic number, because the mean of its divisors is an integer number (3322703347488).

Almost surely, 2^{61640716255454} is an apocalyptic number.

61640716255454 is a deficient number, since it is larger than the sum of its proper divisors (44685790864162).

61640716255454 is a wasteful number, since it uses less digits than its factorization.

61640716255454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941280.

The product of its (nonzero) digits is 24192000, while the sum is 56.

The spelling of 61640716255454 in words is "sixty-one trillion, six hundred forty billion, seven hundred sixteen million, two hundred fifty-five thousand, four hundred fifty-four".