61518353855612 has 6 divisors (see below), whose sum is σ = 107657119247328. Its totient is φ = 30759176927804.

The previous prime is 61518353855603. The next prime is 61518353855659. The reversal of 61518353855612 is 21655835381516.

It is a super-2 number, since 2×61518353855612² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7689794231948 + ... + 7689794231955.

It is an arithmetic number, because the mean of its divisors is an integer number (17942853207888).

Almost surely, 2^{61518353855612} is an apocalyptic number.

It is an amenable number.

61518353855612 is a deficient number, since it is larger than the sum of its proper divisors (46138765391716).

61518353855612 is a wasteful number, since it uses less digits than its factorization.

61518353855612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15379588463907 (or 15379588463905 counting only the distinct ones).

The product of its digits is 25920000, while the sum is 59.

The spelling of 61518353855612 in words is "sixty-one trillion, five hundred eighteen billion, three hundred fifty-three million, eight hundred fifty-five thousand, six hundred twelve".