61063653840 has 80 divisors (see below), whose sum is σ = 216339808128. Its totient is φ = 13957406208.

The previous prime is 61063653811. The next prime is 61063653869. The reversal of 61063653840 is 4835636016.

It is an interprime number because it is at equal distance from previous prime (61063653811) and next prime (61063653869).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 61063653792 and 61063653801.

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, 18172027 + ... + 18175386.

Almost surely, 2^61063653840 is an apocalyptic number.

61063653840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61063653840 is an abundant number, since it is smaller than the sum of its proper divisors (155276154288).

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

61063653840 is a wasteful number, since it uses less digits than its factorization.

61063653840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36347436 (or 36347430 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 61063653840 in words is "sixty-one billion, sixty-three million, six hundred fifty-three thousand, eight hundred forty".