55778348313061 has 64 divisors (see below), whose sum is σ = 65977466388480. Its totient is φ = 46583009858560.

The previous prime is 55778348313059. The next prime is 55778348313133. The reversal of 55778348313061 is 16031384387755.

It is a cyclic number.

It is not a de Polignac number, because 55778348313061 - 2¹ = 55778348313059 is a prime.

It is a super-2 number, since 2×55778348313061² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55778348313161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9316574310 + ... + 9316580296.

It is an arithmetic number, because the mean of its divisors is an integer number (1030897912320).

Almost surely, 2^{55778348313061} is an apocalyptic number.

It is an amenable number.

55778348313061 is a deficient number, since it is larger than the sum of its proper divisors (10199118075419).

55778348313061 is a wasteful number, since it uses less digits than its factorization.

55778348313061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8754.

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 55778348313061 in words is "fifty-five trillion, seven hundred seventy-eight billion, three hundred forty-eight million, three hundred thirteen thousand, sixty-one".