61637622673615 has 16 divisors (see below), whose sum is σ = 75215679058080. Its totient is φ = 48477227195520.

The previous prime is 61637622673559. The next prime is 61637622673633. The reversal of 61637622673615 is 51637622673616.

It is a happy number.

It is not a de Polignac number, because 61637622673615 - 2⁴¹ = 59438599418063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

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, 50455164 + ... + 51662353.

It is an arithmetic number, because the mean of its divisors is an integer number (4700979941130).

Almost surely, 2^{61637622673615} is an apocalyptic number.

61637622673615 is a deficient number, since it is larger than the sum of its proper divisors (13578056384465).

61637622673615 is a wasteful number, since it uses less digits than its factorization.

61637622673615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102119562.

The product of its digits is 68584320, while the sum is 61.

Subtracting from 61637622673615 its reverse (51637622673616), we obtain a palindrome (9999999999999).

The spelling of 61637622673615 in words is "sixty-one trillion, six hundred thirty-seven billion, six hundred twenty-two million, six hundred seventy-three thousand, six hundred fifteen".