61516226556444 has 48 divisors (see below), whose sum is σ = 156587860074240. Its totient is φ = 18641149635840.

The previous prime is 61516226556427. The next prime is 61516226556461. The reversal of 61516226556444 is 44465562261516.

It is an interprime number because it is at equal distance from previous prime (61516226556427) and next prime (61516226556461).

It is a super-2 number, since 2×61516226556444² (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 in 15 ways as a sum of consecutive naturals, for example, 18091737 + ... + 21221295.

It is an arithmetic number, because the mean of its divisors is an integer number (3262247084880).

Almost surely, 2^{61516226556444} is an apocalyptic number.

It is an amenable number.

61516226556444 is an abundant number, since it is smaller than the sum of its proper divisors (95071633517796).

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

61516226556444 is a wasteful number, since it uses less digits than its factorization.

61516226556444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278490 (or 3278488 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 57.

The spelling of 61516226556444 in words is "sixty-one trillion, five hundred sixteen billion, two hundred twenty-six million, five hundred fifty-six thousand, four hundred forty-four".