61862557407 has 32 divisors (see below), whose sum is σ = 101023859712. Its totient is φ = 32899198464.

The previous prime is 61862557399. The next prime is 61862557409. The reversal of 61862557407 is 70475526816.

It is not a de Polignac number, because 61862557407 - 2³ = 61862557399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61862557407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61862557409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1712938 + ... + 1748679.

It is an arithmetic number, because the mean of its divisors is an integer number (3156995616).

Almost surely, 2^61862557407 is an apocalyptic number.

61862557407 is a deficient number, since it is larger than the sum of its proper divisors (39161302305).

61862557407 is a wasteful number, since it uses less digits than its factorization.

61862557407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461687.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 61862557407 in words is "sixty-one billion, eight hundred sixty-two million, five hundred fifty-seven thousand, four hundred seven".