61513458646 has 32 divisors (see below), whose sum is σ = 98127313920. Its totient is φ = 28857791424.

The previous prime is 61513458637. The next prime is 61513458679. The reversal of 61513458646 is 64685431516.

It is a super-3 number, since 3×61513458646³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61513458646.

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, 1232106 + ... + 1281058.

It is an arithmetic number, because the mean of its divisors is an integer number (3066478560).

Almost surely, 2^61513458646 is an apocalyptic number.

61513458646 is a deficient number, since it is larger than the sum of its proper divisors (36613855274).

61513458646 is a wasteful number, since it uses less digits than its factorization.

61513458646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49500.

The product of its digits is 2073600, while the sum is 49.

The spelling of 61513458646 in words is "sixty-one billion, five hundred thirteen million, four hundred fifty-eight thousand, six hundred forty-six".