61965051784854 has 32 divisors (see below), whose sum is σ = 129319096541184. Its totient is φ = 19756861872000.

The previous prime is 61965051784847. The next prime is 61965051784919. The reversal of 61965051784854 is 45848715056916.

It is a super-2 number, since 2×61965051784854² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

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, 25381854 + ... + 27715854.

It is an arithmetic number, because the mean of its divisors is an integer number (4041221766912).

Almost surely, 2^{61965051784854} is an apocalyptic number.

61965051784854 is an abundant number, since it is smaller than the sum of its proper divisors (67354044756330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61965051784854 is a wasteful number, since it uses less digits than its factorization.

61965051784854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526412.

The product of its (nonzero) digits is 290304000, while the sum is 69.

The spelling of 61965051784854 in words is "sixty-one trillion, nine hundred sixty-five billion, fifty-one million, seven hundred eighty-four thousand, eight hundred fifty-four".