61672257775 has 12 divisors (see below), whose sum is σ = 76484428344. Its totient is φ = 49330820000.

The previous prime is 61672257721. The next prime is 61672257781. The reversal of 61672257775 is 57775227616.

It is not a de Polignac number, because 61672257775 - 2¹⁵ = 61672225007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9225 + ... + 351325.

It is an arithmetic number, because the mean of its divisors is an integer number (6373702362).

Almost surely, 2^61672257775 is an apocalyptic number.

61672257775 is a deficient number, since it is larger than the sum of its proper divisors (14812170569).

61672257775 is a wasteful number, since it uses less digits than its factorization.

61672257775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349322 (or 349317 counting only the distinct ones).

The product of its digits is 8643600, while the sum is 55.

The spelling of 61672257775 in words is "sixty-one billion, six hundred seventy-two million, two hundred fifty-seven thousand, seven hundred seventy-five".