61026815437 has 12 divisors (see below), whose sum is σ = 70994439360. Its totient is φ = 52305705816.

The previous prime is 61026815431. The next prime is 61026815449. The reversal of 61026815437 is 73451862016.

It is not a de Polignac number, because 61026815437 - 2¹⁵ = 61026782669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61026815393 and 61026815402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61026815431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1484364 + ... + 1524922.

It is an arithmetic number, because the mean of its divisors is an integer number (5916203280).

Almost surely, 2^61026815437 is an apocalyptic number.

It is an amenable number.

61026815437 is a deficient number, since it is larger than the sum of its proper divisors (9967623923).

61026815437 is a wasteful number, since it uses less digits than its factorization.

61026815437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71280 (or 71273 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 61026815437 in words is "sixty-one billion, twenty-six million, eight hundred fifteen thousand, four hundred thirty-seven".