61444257630454 has 4 divisors (see below), whose sum is σ = 92166386445684. Its totient is φ = 30722128815226.

The previous prime is 61444257630407. The next prime is 61444257630463. The reversal of 61444257630454 is 45403675244416.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×61444257630454² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61444257630395 and 61444257630404.

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, 15361064407612 + ... + 15361064407615.

It is an arithmetic number, because the mean of its divisors is an integer number (23041596611421).

Almost surely, 2^{61444257630454} is an apocalyptic number.

61444257630454 is a deficient number, since it is larger than the sum of its proper divisors (30722128815230).

61444257630454 is a wasteful number, since it uses less digits than its factorization.

61444257630454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30722128815229.

The product of its (nonzero) digits is 38707200, while the sum is 55.

The spelling of 61444257630454 in words is "sixty-one trillion, four hundred forty-four billion, two hundred fifty-seven million, six hundred thirty thousand, four hundred fifty-four".