61612813772 has 6 divisors (see below), whose sum is σ = 107822424108. Its totient is φ = 30806406884.

The previous prime is 61612813763. The next prime is 61612813781. The reversal of 61612813772 is 27731821616.

It is an interprime number because it is at equal distance from previous prime (61612813763) and next prime (61612813781).

It is a super-2 number, since 2×61612813772² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7701601718 + ... + 7701601725.

It is an arithmetic number, because the mean of its divisors is an integer number (17970404018).

Almost surely, 2^61612813772 is an apocalyptic number.

It is an amenable number.

61612813772 is a deficient number, since it is larger than the sum of its proper divisors (46209610336).

61612813772 is a wasteful number, since it uses less digits than its factorization.

61612813772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15403203447 (or 15403203445 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The spelling of 61612813772 in words is "sixty-one billion, six hundred twelve million, eight hundred thirteen thousand, seven hundred seventy-two".