61437917478 has 32 divisors (see below), whose sum is σ = 140518388736. Its totient is φ = 17542582848.

The previous prime is 61437917473. The next prime is 61437917501. The reversal of 61437917478 is 87471973416.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61437917473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395551 + ... + 528522.

It is an arithmetic number, because the mean of its divisors is an integer number (4391199648).

Almost surely, 2^61437917478 is an apocalyptic number.

61437917478 is an abundant number, since it is smaller than the sum of its proper divisors (79080471258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61437917478 is a wasteful number, since it uses less digits than its factorization.

61437917478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925668.

The product of its digits is 7112448, while the sum is 57.

The spelling of 61437917478 in words is "sixty-one billion, four hundred thirty-seven million, nine hundred seventeen thousand, four hundred seventy-eight".